The cold equationstom Godwin



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work. You'll have broken blisters on every finger tonight or you'll go on the log-carrying force tomorrow. Now, move!"What Bemmon had thought to be his wrath deserted him before Prentiss's fury. He stooped to obey the order but the hatred remained on his face and when the hatchet was in his hands he made a last attempt to bluster:"The day may come when we'll refuse to tolerate any longer your sadistic displays of authority.""Good," Prentiss said. "Anyone who doesn't like my style is welcome to try to change it—or to try to replace me. With knives or clubs, rifles or broken hatchets, Bemmon—any way you want it and any time you want it.""I—" Bemmon's eyes went from the hatchet in his half raised hand to the long knife in Prentiss's belt. He swallowed with a convulsive jerk of his Adam's apple and his hatchet-bearing arm suddenly wilted. "I don't want to fight—to replace you—"He swallowed again and his face forced itself into a sickly attempt at an ingratiating smile. "I didn't mean to imply any disrespect for you or the good job you're doing. I'm very sorry."Then he hurried away, like a man glad to escape, and began to chop stakes with amazing speed.But the sullen hatred had not been concealed by the ingratiating smile; and Prentiss knew Bemmon was a man who would always be his enemy.* * *The days dragged by in the weary routine, but overworked muscles slowly strengthened and people moved with a little less laborious effort. On the twentieth day the wall was finally completed and the camp was prowler proof.But the spring weather was a mad succession of heat and cold and storm that caused the Hell Fever to take its toll each day and there was no relaxation from the grueling labor. Weatherproof shelters had to be built as rapidly as possible.So the work of constructing them began; wearily, sometimes almost hopelessly, but without complaint other than to hate and curse the Gerns more than ever.There was no more trouble from Bemmon; Prentiss had almost forgotten him when he was publicly challenged one night by a burly, threatening man named Haggar."You've bragged that you'll fight any man who dares disagree with you," Haggar said loudly. "Well, here I am. We'll use knives and before they even have time to bury you tonight I'm goin' to have your stooges kicked out and replaced with men who'll give us competent leadership instead of blunderin' authoritarianism."Prentiss noticed that Haggar seemed to have a little difficulty pronouncing the last word, as though he had learned it only recently."I'll be glad to accommodate you," Prentiss said mildly. "Go get yourself a knife."Haggar already had one, a long-bladed butcher knife, and the duel began. Haggar was surprisingly adept with his knife but he had never had the training and experience in combat that interstellar explorers such as Prentiss had. Haggar was good, but considerably far from good enough.Prentiss did not kill him. He had no compunctions about doing such a thing, but it would have been an unnecessary waste of needed manpower. He gave Haggar a carefully painful and bloody lesson that thoroughly banished all his lust for conflict without seriously injuring him. The duel was over within a minute after it began.Bemmon, who had witnessed the challenge with keen interest and then watched Haggar's defeat with agitation, became excessively friendly and flattering toward Prentiss afterward. Prentiss felt sure, although he had no proof, that it had been Bemmon who had spurred the simple-minded Haggar into challenging him to a duel.If so, the sight of what had happened to Haggar must have effectively dampened Bemmon's desire for revenge because he became almost a model worker.* * *As Lake had predicted, he and Prentiss worked together well. Lake calmly took a secondary role, not at all interested in possession of authority but only in the survival of the Rejects. He spoke of the surrender of the Constellation only once, to say:"I knew there could be only Ragnarok in this section of space. I had to order four thousand people to go like sheep to what was to be their place of execution so that four thousand more could live as slaves. That was my last act as an officer."Prentiss suspected that Lake found it impossible not to blame himself subconsciously for what circumstances had forced him to do. It was irrational—but conscientious men were quite often a little irrational in their sense of responsibility.Lake had two subleaders: a genial, red-haired man named Ben Barber, who would have been a farmer on Athena but who made a good subleader on Ragnarok; and a lithe, cat-like man named Karl Schroeder.Schroeder claimed to be twenty-four but not even the scars on his face could make him look more than twenty-one. He smiled often, a little too often. Prentiss had seen smiles like that before. Schroeder was the type who could smile while he killed a man—and he probably had.But, if Schroeder was a born fighter and perhaps killer, they were characteristics that he expended entirely upon the prowlers. He was Lake's right-hand man; a deadly marksman and utterly without fear.One evening, when Lake had given Schroeder some instructions concerning the next day's activities, Schroeder answered him with the half-mocking smile and the words, "I'll see that it's done, Commander.""Not 'Commander,' " Lake said. "I—all of us—left our ranks, titles and honors on the Constellation. The past is dead for us.""I see," Schroeder said. The smile faded away and he looked into Lake's eyes as he asked, "And what about our past dishonors, disgraces and such?""They were left on the Constellation, too," Lake said. "If anyone wants dishonor he'll have to earn it all over again.""That sounds fair," Schroeder said. "That sounds as fair as anyone could ever ask for."He turned away and Prentiss saw what he had noticed before: Schroeder's black hair was coming out light brown at the roots. It was a color that would better match his light complexion and it was the color of hair that a man named Schrader, wanted by the police on Venus, had had.Hair could be dyed, identification cards could be forged—but it was all something Prentiss did not care to pry into until and if Schroeder gave him reason to. Schroeder was a hard and dangerous man, despite his youth, and sometimes men of that type, when the chips were down, exhibited a higher sense of duty than the soft men who spoke piously of respect for Society—and then were afraid to face danger to protect the society and the people they claimed to respect.* * *A lone prowler came on the eleventh night following the wall's completion. It came silently, in the dead of night, and it learned how to reach in and tear apart the leather lashings that held the pointed stakes in place and then jerk the stakes out of their sockets. It was seen as it was removing the third stake—which would have made a large enough opening for it to come through—and shot. It fell back and managed to escape into the woods, although staggering and bleeding.The next night the stockade was attacked by dozens of prowlers who simultaneously began removing the pointed stakes in the same manner employed by the prowler of the night before. Their attack was turned back with heavy losses on both sides and with a dismayingly large expenditure of precious ammunition.There could be no doubt about how the band of prowlers had learned to remove the stakes: the prowler of the night before had told them before it died. It was doubtful that the prowlers had a spoken language, but they had some means of communication. They worked together and they were highly intelligent, probably about halfway between dog and man.The prowlers were going to be an enemy even more formidable than Prentiss had thought.The missing stakes were replaced the next day and the others were tied down more securely. Once again the camp was prowler proof—but only for so long as armed guards patrolled inside the walls to kill attacking prowlers during the short time it would take them to remove the stakes.The hunting parties suffered unusually heavy losses from prowler attacks that day and that evening, as the guards patrolled inside the walls, Lake said to Prentiss:"The prowlers are so damnably persistent. It isn't that they're hungry—they don't kill us to eat us. They don't have any reason to kill us—they just hate us.""They have a reason," Prentiss said. "They're doing the same thing we're doing: fighting for survival."Lake's pale brows lifted in question."The prowlers are the rulers of Ragnarok," Prentiss said. "They fought their way up here, as men did on Earth, until they're master of every creature on their world. Even of the unicorns and swamp crawlers. But now we've come and they're intelligent enough to know that we're accustomed to being the dominant species, ourselves."There can't be two dominant species on the same world—and they know it. Men or prowlers—in the end one is going to have to go down before the other.""I suppose you're right," Lake said. He looked at the guards, a fourth of them already reduced to bows and arrows that they had not yet had time to learn how to use. "If we win the battle for supremacy it will be a long fight, maybe over a period of centuries. And if the prowlers win—it may all be over within a year or two."* * *The giant blue star that was the other component of Ragnarok's binary grew swiftly in size as it preceded the yellow sun farther each morning. When summer came the blue star would be a sun as hot as the yellow sun and Ragnarok would be between them. The yellow sun would burn the land by day and the blue sun would sear it by the night that would not be night. Then would come the brief fall, followed by the long, frozen winter when the yellow sun would shine pale and cold, far to the south, and the blue sun would be a star again, two hundred and fifty million miles away and invisible behind the cold yellow sun.The Hell Fever lessened with the completion of the shelters but it still killed each day. Chiara and his helpers worked with unfaltering determination to find a cure for it but the cure, if there was one, eluded them. The graves in the cemetery were forty long by forty wide and more were added each day. To all the fact became grimly obvious: they were swiftly dying out and they had yet to face Ragnarok at its worst.The old survival instincts asserted themselves and there were marriages among the younger ones. One of the first to marry was Julia.She stopped to talk to Prentiss one evening. She still wore the red skirt, now faded and patched, but her face was tired and thoughtful and no longer bold."Is it true, John," she asked, "that only a few of us might be able to have children here and that most of us who tried to have children in this gravity would die for it?""It's true," he said. "But you already knew that when you married.""Yes . . . I knew it." There was a little silence. "All my life I've had fun and done as I pleased. The human race didn't need me and we both knew it. But now—none of us can be apart from the others or be afraid of anything. If we're selfish and afraid there will come a time when the last of us will die and there will be nothing on Ragnarok to show we were ever here."I don't want it to end like that. I want there to be children, to live after we're gone. So I'm going to try to have a child. I'm not afraid and I won't be."When he did not reply at once she said, almost self-consciously, "Coming from me that all sounds a little silly, I suppose.""It sounds wise and splendid, Julia," he said, "and it's what I thought you were going to say."* * *Full spring came and the vegetation burst into leaf and bud and bloom, quickly, for its growth instincts knew in their mindless way how short was the time to grow and reproduce before the brown death of summer came. The prowlers were suddenly gone one day, to follow the spring north, and for a week men could walk and work outside the stockade without the protection of armed guards.Then the new peril appeared, the one they had not expected: the unicorns.The stockade wall was a blue-black rectangle behind them and the blue star burned with the brilliance of a dozen moons, lighting the woods in blue shadow and azure light. Prentiss and the hunter walked a little in front of the two riflemen, winding to keep in the starlit glades."It was on the other side of the next grove of trees," the hunter said in a low voice. "Fred was getting ready to bring in the rest of the woods goats. He shouldn't have been more than ten minutes behind me—and it's been over an hour."They rounded the grove of trees. At first it seemed there was nothing before them but the empty, grassy glade. Then they saw it lying on the ground no more than twenty feet in front of them.It was—it had been—a man. He was broken and stamped into hideous shapelessness and something had torn off his arms.For a moment there was dead silence, then the hunter whispered, "What did that?"The answer came in a savage, squealing scream and the pound of cloven hooves. A formless shadow beside the trees materialized into a monstrous charging bulk; a thing like a gigantic gray bull, eight feet tall at the shoulders, with the tusked, snarling head of a boar and the starlight glinting along the curving, vicious length of its single horn."Unicorn!" Prentiss said, and jerked up his rifle.The rifles cracked in a ragged volley. The unicorn squealed in fury and struck the hunter, catching him on its horn and hurling him thirty feet. One of the riflemen went down under the unicorn's hooves, his cry ending almost as soon as it began.The unicorn ripped the sod in deep furrows as it whirled back to Prentiss and the remaining rifle

an; not turning in the manner of four-footed beasts of Earth but rearing and spinning on its hind feet. It towered above them as it whirled, the tip of its horn fifteen feet above the ground and its hooves swinging around like great clubs.Prentiss shot again, his sights on what he hoped would be a vital area, and the rifleman shot an instant later.The shots went true. The unicorn's swing brought it on around but it collapsed, falling to the ground with jarring heaviness."We got it!" the rifleman said. "We—"It half scrambled to its feet and made a noise; a call that went out through the night like the blast of a mighty trumpet. Then it dropped back to the ground, to die while its call was still echoing from the nearer hills.From the east came an answering trumpet blast; a trumpeting that was sounded again from the south and from the north. Then there came a low and muffled drumming, like the pounding of thousands of hooves.The rifleman's face was blue-white in the starlight. "The others are coming—we'll have to run for it!"He turned, and began to run toward the distant bulk of the stockade."No!" Prentiss commanded, quick and harsh. "Not the stockade!"The rifleman kept running, seeming not to hear him in his panic. Prentiss called to him once more:"Not the stockade—you'll lead the unicorns into it!"Again the rifleman seemed not to hear him.The unicorns were coming in sight, converging in from the north and east and south, the rumble of their hooves swelling to a thunder that filled the night. The rifleman would reach the stockade only a little ahead of them and they would go through the wall as though it had been made of paper.For a while the area inside the stockade would be filled with dust, with the squealing of the swirling, charging unicorns and the screams of the dying. Those inside the stockade would have no chance whatever of escaping. Within two minutes it would be over, the last child would have been found among the shattered shelters and trampled into lifeless shapelessness in the bloody ground.Within two minutes all human life on Ragnarok would be gone.There was only one thing for him to do.He dropped to one knee so his aim would be steady and the sights of his rifle caught the running man's back. He pressed the trigger and the rifle cracked viciously as it bucked against his shoulder.The man spun and fell hard to the ground. He twisted, to raise himself up a little and look back, his face white and accusing and unbelieving."You shot me!"Then he fell forward and lay without moving.Prentiss turned back to face the unicorns and to look at the trees in the nearby grove. He saw what he already knew: they were young trees and too small to offer any escape for him. There was no place to run, no place to hide.There was nothing he could do but wait; nothing he could do but stand in the blue starlight and watch the devil's herd pound toward him and think, in the last moments of his life, how swiftly and unexpectedly death could come to man on Ragnarok.* * *The unicorns held the Rejects prisoners in their stockade the rest of the night and all the next day. Lake had seen the shooting of the rifleman and had watched the unicorn herd kill John Prentiss and then trample the dead rifleman.He had already given the order to build a quick series of fires around the inside of the stockade walls when the unicorns paused to tear their victims to pieces, grunting and squealing in triumph as bones crushed between their teeth and they flung the pieces to one side.The fires were started and green wood was thrown on them, to make them smolder and smoke for as long as possible. Then the unicorns were coming on to the stockade and every person inside it went into the concealment of the shelters.Lake had already given his last order: There would be absolute quiet until and if the unicorns left; a quiet that would be enforced with fist or club wherever necessary.The unicorns were still outside when morning came. The fires could not be refueled; the sight of a man moving inside the stockade would bring the entire herd charging through. The hours dragged by, the smoke from the dying fires dwindled to thin streamers. The unicorns grew increasingly bolder and suspicious, crowding closer to the walls and peering through the openings between rails.The sun was setting when one of the unicorns trumpeted; a sound different from that of the call to battle. The others threw up their heads to listen, then they turned and drifted away. Within minutes the entire herd was gone out of sight through the woods, toward the north.Lake waited and watched until he was sure the unicorns were gone for good. Then he ordered the All Clear given and hurried to the south wall, to look down across the barren valley and hope he would not see what he expected to see.Barber came up behind him, to sigh with relief. "That was close. It's hard to make so many people stay absolutely quiet for hour after hour. Especially the children—they don't understand.""We'll have to leave," Lake said."Leave?" Barber asked. "We can make this stockade strong enough to hold out unicorns.""Look to the south," Lake told him.Barber did so and saw what Lake had already seen; a broad, low cloud of dust moving slowly toward them."Another herd of unicorns," Lake said. "John didn't know they migrated—the Dunbar Expedition wasn't here long enough to learn that. There'll be herd after herd coming through and no time for us to strengthen the walls. We'll have to leave tonight."* * *Preparations were made for the departure; preparations that consisted mainly of providing each person with as much in the way of food or supplies as he or she could carry. In the 1.5 gravity, that was not much.They left when the blue star rose. They filed out through the northern gate and the rear guard closed it behind them. There was almost no conversation among them. Some of them turned to take a last look at what had been the only home they had ever known on Ragnarok, then they all faced forward again, to the northwest, where the foothills of the plateau might offer them sanctuary.They found their sanctuary on the second day; a limestone ridge honey-combed with caves. Men were sent back at once to carry the food and supplies left in the stockade to the new home.They returned, to report that the second herd of unicorns had broken down the walls and ripped the interior of the stockade into wreckage. Much of the food and supplies had been totally destroyed.Lake sent them back twice more to bring everything, down to the last piece of bent metal or torn cloth. They would find uses for all of it in the future.* * *The cave system was extensive, containing room for several times their number. The deeper portions of the caves could not be lived in until ventilation ducts were made, but the outer caves were more than sufficient in number. Work was begun to clear them of fallen rubble, to pry down all loose material overhead and to level the floors. A spring came out of the ridge not far from the caves and the approach to the caves was so narrow and steep that unicorns could scramble up it only with difficulty and one at a time. And should they ever reach the natural terrace in front of the caves they would be too large to enter and could do no more than stand outside and make targets of themselves for the bowmen within.Anders was in charge of making the caves livable, his working force restricted almost entirely to women and children. Lake sent Barber out, with a small detachment of men, to observe the woods goats and learn what plants they ate. And then learn, by experimenting, if such plants could be safely eaten by humans.The need for salt would be tremendously increased when summer came. Having once experienced a saltless two weeks in the desert Lake doubted that any of them could survive without it. All hunting parties, as well as Barber's party, were ordered to investigate all deposits that might contain salt as well as any stream or pond that was white along the banks.The hunting parties were of paramount importance and they were kept out to the limits of their endurance. Every man physically able to do so accompanied them. Those who could not kill game could carry it back to the caves. There was no time to spare; already the unicorns were decreasing in numbers and the woods goats were ranging farther and farther north.At the end of twenty days Lake went in search of Barber and his party, worried about them. Their mission was one that could be as dangerous as any hunting trip. There was no proof that humans and Ragnarok creatures were so similar as to guarantee that food for one might not be poison for the other. It was a very necessary mission, however; dried meat, alone, would bring grave deficiency diseases during the summer which dried herbs and fruits would help prevent.When he located Barber's party he found Barber lying under a tree, pale and weak from his latest experiment but recovering."I was the guinea pig yesterday," Barber said. "Some little purple berries that the woods goats nibble at sometimes, maybe to get a touch of some certain vitamin or something. I ate too many, I guess, because they hit my heart like the kick of a mule.""Did you find anything at all encouraging?" Lake asked."We found four different herbs that are the most violent cathartics you ever dreamed of. And a little silvery fern that tastes like vanilla flavored candy and paralyzes you stiff as a board on the third swallow. It's an hour before you come back out of it."But on the good side we found three different kinds of herbs that seem to be all right. We've been digging them up and hanging them in the trees to dry."Lake tried the edible herbs and found them to be something like spinach in taste. There was a chance they might contain the vitamins and minerals needed. Since the hunting parties were living exclusively on meat he would have to point out the edible herbs to all of them so they would know what to eat should any of them feel the effects of diet deficiency.He traveled alone as he visited the various hunting parties, finding such travel to be safer each day as the dwindling of the unicorns neared the vanishing point. It was a safety he did not welcome; it meant the last of the game would be gone north long before sufficient meat was taken.None of the hunting parties could report good luck. The woods goats, swift and elusive at best, were vanishing with the unicorns. The last cartridge had been fired and the bowmen, while improving all the time, were far from expert. The unicorns, which should have been their major source of meat, were invulnerable to arrows unless shot at short range in the side of the neck just behind the head. And at short range the unicorns invariably charged and presented no such target.He made the long, hard climb up the plateau's southern face, to stand at last on top. It was treeless, a flat, green table that stretched to the north for as far as he could see. A mountain range, still capped with snow, lay perhaps a hundred miles to the northwest; in the distance it looked like a white, low-lying cloud on the horizon. No other mountains or hills marred the endless sweep of the high plain.The grass was thick and here and there were little streams of water produced by the recently melted snow. It was a paradise land for the herbivores of Ragnarok but for men it was a harsh, forbidding place. At that elevation the air was so thin that only a moderate amount of exertion made the heart and lungs labor painfully. Hard and prolonged exertion would be impossible.It seemed unlikely that men could hunt and dare unicorn attacks at such an elevation but two hunting parties were ahead of him; one under the grim Craig and one under the reckless Schroeder, both parties stripped down to the youngest, strongest men among all the Rejects.He found Schroeder early one morning, leading his hunters toward a small band of woods goats. Two unicorns were grazing in between and the hunters were swinging downwind from them. Schroeder saw him coming and walked back a little way to meet him."Welcome to our breathtaking land," Schroeder greeted him. "How are things going with the rest of the hunting parties?"Schroeder was gaunt and there was weariness beneath his still lithe movements. His whiskers were an untamed sorrel bristling and across his cheekbone was the ugly scar of a half healed wound. Another gash was ripped in his arm and something had battered one ear. He reminded Lake of a battle-scarred, indomitable tomcat who would never, for as long as he lived, want to relinquish the joy of conflict and danger."So far," he answered, "you and Craig are the only parties to manage to tackle the plateau."He asked about Schroeder's luck and learned it had been much better than that of the others due to killing three unicorns by a method Schroeder had thought of."Since the bowmen have to be to one side of the unicorns to kill them," Schroeder said, "it only calls for a man to be the decoy and let the unicorns chase him between the hidden bowmen. If there's no more than one or two unicorns and if the decoy doesn't have to run very far and if the bowmen don't miss it works well.""Judging from your beat-up condition," Lake said, "you must have been the decoy every time.""Well—" Schroeder shrugged his shoulders. "It was my idea.""I've been wondering about another way to get in shots at close range," Lake said. "Take the skin of a woods goat, give it the original shape as near as possible, and a bowman inside it might be able to fake a grazing woods goat until he got the shot he wanted."The unicorns might never suspect where the arrows came from," he concluded. "And then, of course, they might.""I'll try it before the day is over, on those two unicorns over there," Schroeder said. "At this elevation and in this gravity my own method is just a little bit rough on a man."* * *Lake found Craig and his men several miles to the west, all of them gaunt and bearded as Schroeder had been."We've had hell," Craig said. "It seems that every time we spot a few woods goats there will be a dozen unicorns in between. If only we had rifles for the unicorns . . ."Lake told him of the plan to hide under woods goats' skins and of the decoy system used by Schroeder."Maybe we won't have to use Schroeder's method," he said. "We'll see if the other works—I'll give it the first try."This he was not to do. Less than an hour later one of the men who helped dry the meat and carry it to the caves returned to report the camp stricken by a strange, sudden malady that was killing a hundred a day. Dr. Chiara, who had collapsed while driving himself on to care for the sick, was sure it was a deficiency disease. Anders was down with it, helpless, and Bemmon had assumed command; setting up daily work quotas for those still on their feet and refusing to heed Chiara's requests concerning treatment of the disease.Lake made the trip back to the caves in a fraction of the length of time it had taken him to reach the plateau, walking until he was ready to drop and then pausing only for an hour or two of rest. He spotted Barber's camp when coming down off the plateau and he swung to one side, to tell Barber to have a supply of the herbs sent to the caves at once.He reached the caves, to find half the camp in bed and the other half dragging about listlessly at the tasks given them by Bemmon. Anders was in grave condition, too weak to rise, and Dr. Chiara was dying.He squatted down beside Chiara's pallet and knew there could be no hope for him. On Chiara's pale face and in his eyes was the shadow of his own foreknowledge."I finally saw what it was"—Chiara's words were very low, hard to hear—"and I told Bemmon what to do. It's a deficiency disease, complicated by the gravity into some form not known on Earth."He stopped to rest and Lake waited."Beri-beri—pellagra—we had deficiency diseases on Earth. But none so fatal—so quickly. I told Bemmon—ration out fruits and vegetables to everybody. Hurry—or it will be too late."Again he stopped to rest, the last vestige of color gone from his face."And you?" Lake asked, already knowing the answer."For me—too late. I kept thinking of viruses—should have seen the obvious sooner. Just like—"His lips turned up a little at the corners and the Chiara of the dead past smiled for the last time at Lake."Just like a damned fool intern . . ."That was all, then, and the chamber was suddenly very quiet. Lake stood up to leave, and to speak the words that Chiara could never hear:"We're going to need you and miss you—Doctor."* * *He found Bemmon in the food storage cavern, supervising the work of two teen-age boys with critical officiousness although he was making no move to help them. At sight of Lake he hurried forward, the ingratiating smile sliding across his face."I'm glad you're back," he said. "I had to take charge when Anders got sick and he had everything in such a mess. I've been working day and night to undo his mistakes and get the work properly under way again."Lake looked at the two thin-faced boys who had taken advantage of the opportunity to rest. They leaned wearily against the heavy pole table Bemmon had had them moving, their eyes already dull with incipient sickness and watching him in mute appeal."Have you obeyed Chiara's order?" he asked."Ah—no," Bemmon said. "I felt it best to ignore it.""Why?" Lake asked."It would be a senseless waste of our small supply of fruit and vegetable foods to give them to people already dying. I'm afraid"—the ingratiating smile came again—"we've been letting him exercise an authority he isn't entitled to. He's really hardly more than a medical student and his diagnoses are only guesses.""He's dead," Lake said flatly. "His last order will be carried out."He looked from the two tired boys to Bemmon, contrasting their thinness and weariness with the way Bemmon's paunch still bulged outward and his jowls still sagged with their load of fat."I'll send West down to take over in here," he said to Bemmon. "You come with me. You and I seem to be the only two in good health here and there's plenty of work for us to do."The fawning expression vanished from Bemmon's face. "I see," he said. "Now that I've turned Anders's muddle into organization, you'll hand my authority over to another of your favorites and demote me back to common labor?""Setting up work quotas for sick and dying people isn't organization," Lake said. He spoke to the two boys, "Both of you go lie down. West will find someone else." Then to Bemmon, "Come with me. We're both going to work at common labor."They passed by the cave where Bemmon slept. Two boys were just going into it, carrying armloads of dried grass to make a mattress under Bemmon's pallet. They moved slowly, heavily. Like the two boys in the food storage cave they were dull-eyed with the beginning of the sickness.Lake stopped, to look more closely into the cave and verify something else he thought he had seen: Bemmon had discarded the prowler skins on his bed and in their place were soft wool blankets; perhaps the only unpatched blankets the Rejects possessed."Go back to your caves," he said to the boys. "Go to bed and rest."He looked at Bemmon. Bemmon's eyes flinched away, refusing to meet his."What few blankets we have are for babies and the very youngest children," he said. His tone was coldly unemotional but he could not keep his fists from clenching at his sides. "You will return them at once and sleep on animal skins, as all the men and women do. And if you want grass for a mattress you will carry it yourself, as even the young children do."Bemmon made no answer, his face a sullen red and hatred shining in the eyes that still refused to meet Lake's."Gather up the blankets and return them," Lake said. "Then come on up to the central cave. We have a lot of work to do."He could feel Bemmon's gaze burning against his back as he turned away and he thought of what John Prentiss had once said:"I know he's no good but he never has guts enough to go quite far enough to give me an excuse to whittle him down."* * *Barber's men arrived the next day, burdened with dried herbs. These were given to the seriously ill as a supplement to the ration of fruit and vegetable foods and were given, alone, to those not yet sick. Then came the period of waiting; of hoping that it was all not too late and too little.A noticeable change for the better began on the second day. A week went by and the sick were slowly, steadily, improving. The not-quite-sick were already back to normal health. There was no longer any doubt: the Ragnarok herbs would prevent a recurrence of the disease.It was, Lake thought, all so simple once you knew what to do. Hundreds had died, Chiara among them, because they did not have a common herb that grew at a slightly higher elevation. Not a single life would have been lost if he could have looked a week into the future and had the herbs found and taken to the caves that much sooner.But the disease had given no warning of its coming. Nothing, on Ragnarok, ever seemed to give warning before it killed.Another week went by and hunters began to trickle in, gaunt and exhausted, to report all the game going north up the plateau and not a single creature left below. They were the ones who had tried and failed to withstand the high elevation of the plateau. Only two out of three hunters returned among those who had challenged the plateau. They had tried, all of them, to the best of their ability and the limits of their endurance.The blue star was by then a small sun and the yellow sun blazed hotter each day. Grass began to brown and wither on the hillsides as the days went by and Lake knew summer was very near. The last hunting party, but for Craig's and Schroeder's, returned. They had very little meat but they brought with them a large quantity of something almost as important: salt.They had found a deposit of it in an almost inaccessible region of cliffs and canyons. "Not even the woods goats can get in there," Stevens, the leader of that party, said. "If the salt was in an accessible place there would have been a salt lick there and goats in plenty.""If woods goats care for salt the way Earth animals do," Lake said. "When fall comes we'll make a salt lick and find out."Two more weeks went by and Craig and Schroeder returned with their surviving hunters. They had followed the game to the eastern end of the snow-capped mountain range but there the migration had drawn away from them, traveling farther each day than they could travel. They had almost waited too long before turning back: the grass at the southern end of the plateau was turning brown and the streams were dry. They got enough water, barely, by digging seep holes in the dry stream beds.Lake's method of stalking unicorns under the concealment of a woods goat skin had worked well only a few times. After that the unicorns learned to swing downwind from any lone woods goats. If they smelled a man inside the goat skin they charged him and killed him.With the return of the last hunters everything was done that could be done in preparation for summer. Inventory was taken of the total food supply and it was even smaller than Lake had feared. It would be far from enough to last until fall brought the game back from the north and he instituted rationing much stricter than before.The heat increased as the yellow sun blazed hotter and the blue sun grew larger. Each day the vegetation was browner and a morning came when Lake could see no green wherever he looked.They numbered eleven hundred and ten that morning, out of what had so recently been four thousand. Eleven hundred and ten thin, hungry scarecrows who, already, could do nothing more than sit listlessly in the shade and wait for the hell that was coming. He thought of the food supply, so pitifully small, and of the months it would have to last. He saw the grim, inescapable future for his charges: famine. There was nothing he could do to prevent it. He could only try to forestall complete starvation for all by cutting rations to the bare existence level.And that would be bare existence for the stronger of them. The weaker were already doomed.He had them all gather in front of the caves that evening when the terrace was in the shadow of the ridge. He stood before them and spoke to them:"All of you know we have only a fraction of the amount of food we need to see us through the summer. Tomorrow the present ration will be cut in half. That will be enough to live on, just barely. If that cut isn't made the food supply will be gone long before fall and all of us will die."If anyone has any food of any kind it must be turned in to be added to the total supply. Some of you may have thought of your children and kept a little hidden for them. I can understand why you should do that—but you must turn it in. There may possibly be some who hid food for themselves, personally. If so, I give them the first and last warning: turn it in tonight. If any hidden cache of food is found in the future the one who hid it will be regarded as a traitor and murderer."All of you, but for the children, will go into the chamber next to the one where the food is stored. Each of you—and there will be no exceptions regardless of how innocent you are—will carry a bulkily folded cloth or garment. Each of you will go into the chamber alone. There will be no one in there. You will leave the food you have folded in the cloth, if any, and go out the other exit and back to your caves. No one will ever know whether the cloth you carried contained food or not. No one will ever ask."Our survival on this world, if we are to survive at all, can be only by working and sacrificing together. There can be no selfishness. What any of you may have done in the past is of no consequence. Tonight we start anew. From now on we trust one another without reserve."There will be one punishment for any who betray that trust—death."* * *Anders set the example by being the first to carry a folded cloth into the cave. Of them all, Lake heard later, only Bemmon voiced any real indignation; warning all those in his section of the line that the order was the first step toward outright dictatorship and a police-and-spy system in which Lake and the other leaders would deprive them all of freedom and dignity. Bemmon insisted upon exhibiting the emptiness of the cloth he carried; an action that, had he succeeded in persuading the others to follow his example, would have mercilessly exposed those who did have food they were returning.But no one followed Bemmon's example and no harm was done. As for Lake, he had worries on his mind of much greater importance than Bemmon's enmity.* * *The weeks dragged by, each longer and more terrible to endure than the one before it as the heat steadily increased. Summer solstice arrived and there was no escape from the heat, even in the deepest caves. There was no night; the blue sun rose in the east as the yellow sun set in the west. There was no life of any kind to be seen, not even an insect. Nothing moved across the burned land but the swirling dust devils and shimmering, distorted mirages.The death rate increased with appalling swiftness. The small supply of canned and dehydrated milk, fruit and vegetables was reserved exclusively for the children but it was far insufficient in quantity. The Ragnarok herbs prevented any recurrence of the fatal deficiency disease but they provided virtually no nourishment to help fight the heat and gravity. The stronger of the children lay wasted and listless on their pallets while the ones not so strong died each day.Each day thin and hollow-eyed mothers would come to plead with him to save their children. " . . . it would take so little to save his life . . . Please—before it's too late . . ."But there was so little food left and the time was yet so long until fall would bring relief from the famine that he could only answer each of them with a grim and final "No."And watch the last hope flicker and die in their eyes and watch them turn away, to go and sit for the last hours beside their children.Bemmon became increasingly irritable and complaining as the rationing and heat made existence a misery; insisting that Lake and the others were to blame for the food shortage, that their hunting efforts had been bungling and faint-hearted. And he implied, without actually saying so, that Lake and the others had forbidden him to go near the food chamber because they did not want a competent, honest man to check up on what they were doing.There were six hundred and three of them the blazing afternoon when the girl, Julia, could stand his constant, vindictive, fault-finding no longer. Lake heard about it shortly afterward, the way she had turned on Bemmon in a flare of temper she could control no longer and said:"Whenever your mouth is still you can hear the children who are dying today—but you don't care. All you can think of is yourself. You claim Lake and the others were cowards—but you didn't dare hunt with them. You keep insinuating that they're cheating us and eating more than we are—but your belly is the only one that has any fat left on it—"She never completed the sentence. Bemmon's face turned livid in sudden, wild fury and he struck her, knocking her against the rock wall so hard that she slumped unconscious to the ground."She's a liar!" he panted, glaring at the others. "She's a rotten liar and anybody who repeats what she said will get what she got!"When Lake learned of what had happened he did not send for Bemmon at once. He wondered why Bemmon's reaction had been so quick and violent and there seemed to be only one answer:Bemmon's belly was still a little fat. There could be but one way he could have kept it so.He summoned Craig, Schroeder, Barber and Anders. They went to the chamber where Bemmon slept and there, almost at once, they found his cache. He had it buried under his pallet and hidden in cavities along the walls; dried meat, dried fruits and milk, canned vegetables. It was an amount amazingly large and many of the items had presumably been exhausted during the deficiency disease attack."It looks," Schroeder said, "like he didn't waste any time feathering his nest when he made himself leader."The others said nothing but stood with grim, frozen faces, waiting for Lake's next action."Bring Bemmon," Lake said to Craig.Craig returned with him two minutes later. Bemmon stiffened at the sight of his unearthed cache and color drained away from his face."Well?" Lake asked."I didn't"—Bemmon swallowed—"I didn't know it was there." And then quickly, "You can't prove I put it there. You can't prove you didn't just now bring it in yourselves to frame me."Lake stared at Bemmon, waiting. The others watched Bemmon as Lake was doing and no one spoke. The silence deepened and Bemmon began to sweat as he tried to avoid their eyes. He looked again at the damning evidence and his defiance broke."It—if I hadn't take it it would have been wasted on people who were dying," he said. He wiped at his sweating face. "I won't ever do it again—I swear I won't."Lake spoke to Craig. "You and Barber take him to the lookout point.""What—" Bemmon's protest was cut off as Craig and Barber took him by the arms and walked him swiftly away.Lake turned to Anders. "Get a rope," he ordered.Anders paled a little. "A—rope?""What else does he deserve?""Nothing," Anders said. "Not—not after what he did."On the way out they passed the place where Julia lay. Bemmon had knocked her against the wall with such force that a sharp projection of rock had cut a deep gash in her forehead. A woman was wiping the blood from her face and she lay limply, still unconscious; a frail shadow of the bold girl she had once been with the new life she would try to give them an almost unnoticeable little bulge in her starved thinness.* * *The lookout point was an outjutting spur of the ridge, six hundred feet from the caves and in full view of them. A lone tree stood there, its dead limbs thrust like white arms through the brown foliage of the limbs that still lived. Craig and Barber waited under the tree, Bemmon between them. The lowering sun shone hot and bright on Bemmon's face as he squinted back toward the caves at the approach of Lake and the other two.He twisted to look at Barber. "What is it—why did you bring me here?" There was the tremor of fear in his voice. "What are you going to do to me?"Barber did not answer and Bemmon turned back toward Lake. He saw the rope in Anders' hand and his face went white with comprehension."No!"Ht threw himself back with a violence that almost tore him loose. "No—no!"Schroeder stepped forward to help hold him and Lake took the rope from Anders. He fashioned a noose in it while Bemmon struggled and made panting, animal sounds, his eyes fixed in horrified fascination on the rope.When the noose was finished he threw the free end of the rope over the white limb above Bemmon. He released the noose and Barber caught it, to draw it snug around Bemmon's neck.Bemmon stopped struggling then and sagged weakly. For a moment it appeared that he would faint. Then he worked his mouth soundlessly until words came:"You won't—you can't—really hang me?"Lake spoke to him:"We're going to hang you. What you stole would have saved the lives of ten children. You've watched the children cry because they were so hungry and you've watched them become too weak to cry or care any more. You've watched them die each day and each night you've secretly eaten the food that was supposed to be theirs."We're going to hang you, for the murder of children and the betrayal of our trust in you. If you have anything to say, say it now.""You can't! I had a right to live—to eat what would have been wasted on dying people!" Bemmon twisted to appeal to the ones who held him, his words quick and ragged with hysteria. "You can't hang me—I don't want to die!"Craig answered him, with a smile that was like the thin snarl of a wolf:"Neither did two of my children."Lake nodded to Craig and Schroeder, not waiting any longer. They stepped back to seize the free end of the rope and Bemmon screamed at what was coming, tearing loose from the grip of Barber.Then his scream was abruptly cut off as he was jerked into the air. There was a cracking sound and he kicked spasmodically, his head setting grotesquely to one side.Craig and Schroeder and Barber watched him with hard, expressionless faces but Anders turned quickly away, to be suddenly and violently sick."He was the first to betray us," Lake said. "Snub the rope and leave him to swing there. If there are any others like him, they'll know what to expect."The blue sun rose as they went back to the caves. Behind them Bemmon swung and twirled aimlessly on the end of the rope. Two long, pale shadows swung and twirled with him; a yellow one to the west and a blue one to the east.Bemmon was buried the next day. Someone cursed his name and someone spit on his grave and then he was part of the dead past as they faced the suffering ahead of them.Julia recovered, although she would always wear a ragged scar on her forehead. Anders, who had worked closely with Chiara and was trying to take his place, quieted her fears by assuring her that the baby she carried was still too small for there to be much danger of the fall causing her to lose it.Three times during the next month the wind came roaring down out of the northwest, bringing a gray dust that filled the sky and enveloped the land in a hot, smothering gloom through which the suns could not be seen.Once black clouds gathered in the distance, to pour out a cloudburst. The 1.5 gravity gave the wall of water that swept down the canyon a far greater force and velocity than it would have had on Earth and boulders the size of small houses were tossed into the air and shattered into fragments. But all the rain fell upon the one small area and not a drop fell at the caves.One single factor was in their favor and but for it they could not have survived such intense, continual heat: there was no humidity. Water evaporated quickly in the hot, dry air and sweat glands operated at the highest possible degree of efficiency. As a result they drank enormous quantities of water—the average adult needed five gallons a day. All canvas had been converted into water bags and the same principle of cooling-by-evaporation gave them water that was only warm instead of sickeningly hot as it would otherwise have been.But despite the lack of humidity the heat was still far more intense than any on Earth. It never ceased, day or night, never let them have a moment's relief. There was a limit to how long human flesh could bear up under it, no matter how valiant the will. Each day the toll of those who had reached that limit was greater, like a swiftly rising tide.There were three hundred and forty of them when the first rain came; the rain that meant the end of summer. The yellow sun moved southward and the blue sun shrank steadily. Grass grew again and the woods goats returned, with them the young that had been born in the north, already half the size of their mothers.For a while there was meat, and green herbs. Then the prowlers came, to make hunting dangerous. Females with pups were seen but always at a great distance as though the prowlers, like humans, took no chances with the lives of their children.The unicorns came close behind the first prowlers, their young amazingly large and already weaned. Hunting became doubly dangerous then but the bowmen, through necessity, were learning how to use their bows with increasing skill and deadliness.A salt lick for the woods goats was hopefully tried, although Lake felt dubious about it. They learned that salt was something the woods goats could either take or leave alone. And when hunters were in the vicinity they left it alone.The game was followed for many miles to the south. The hunters returned the day the first blizzard came roaring and screaming down over the edge of the plateau; the blizzard that marked the beginning of the long, frigid winter. By then they were prepared as best they could be. Wood had been carried in great quantities and the caves fitted with crude doors and a ventilation system. And they had meat—not as much as they would need but enough to prevent starvation.Lake took inventory of the food supply when the last hunters returned and held check-up inventories at irregular and unannounced intervals. He found no shortages. He had expected none—Bemmon's grave had long since been obliterated by drifting snow but the rope still hung from the dead limb, the noose swinging and turning in the wind.* * *Anders had made a Ragnarok calendar that spring, from data given him by John Prentiss, and he had marked the corresponding Earth dates on it. By a coincidence, Christmas came near the middle of the winter. There would be the same rationing of food on Christmas day but little brown trees had been cut for the children and decorated with such ornaments as could be made from the materials at hand.There was another blizzard roaring down off the plateau Christmas morning; a white death that thundered and howled outside the caves at a temperature of more than eighty degrees below zero. But inside the caves it was warm by the fires and under the little brown trees were toys that had been patiently whittled from wood or sewn from scraps of cloth and animal skins while the children slept. They were crude and humble toys but the pale, thin faces of the children were bright with delight when they beheld them.There was the laughter of children at play, a sound that had not been heard for many months, and someone singing the old, old songs. For a few fleeting hours that day, for the first and last time on Ragnarok, there was the magic of an Earth Christmas.That night a child was born to Julia, on a pallet of dried grass and prowler skins. She asked for her baby before she died and they let her have it."I wasn't afraid, was I?" she asked. "But I wish it wasn't so dark—I wish I could see my baby before I go."They took the baby from her arms when she was gone and removed from it the blanket that had kept her from learning that her child was still-born.There were two hundred and fifty of them when the first violent storms of spring came. By then eighteen children had been born. Sixteen were still-born, eight of them deformed by the gravity, but two were like any normal babies on Earth. There was only one difference: the 1.5 gravity did not seem to affect them as much as it had the Earth-born babies.Lake, himself, married that spring; a tall, gray-eyed girl who had fought alongside the men the night of the storm when the prowlers broke into John Prentiss's camp. And Schroeder married, the last of them all to do so.That spring Lake sent out two classes of bowmen: those who would use the ordinary short bow and those who would use the longbows he had had made that winter. According to history the English longbowmen of medieval times had been without equal in the range and accuracy of their arrows and such extra-powerful weapons should eliminate close-range stalking of woods goats and afford better protection from unicorns.The longbows worked so well that by mid-spring he could detach Craig and three others from the hunting and send them on a prospecting expedition. Prentiss had said Ragnarok was devoid of metals but there was the hope of finding small veins the Dunbar Expedition's instruments had not detected. They would have to find metal or else, in the end, they would go back into a flint axe stage.Craig and his men returned when the blue star was a sun again and the heat was more than men could walk and work in. They had traveled hundreds of miles in their circuit and found no metals."I want to look to the south when fall comes," Craig said. "Maybe it will be different down there."They did not face famine that summer as they had the first summer. The diet of meat and dried herbs was rough and plain but there was enough of it.Full summer came and the land was again burned and lifeless. There was nothing to do but sit wearily in the shade and endure the heat, drawing what psychological comfort they could from the fact that summer solstice was past and the suns were creeping south again even though it would be many weeks before there was any lessening of the heat.It was then, and by accident, that Lake discovered there was something wrong about the southward movement of the suns.He was returning from the lookout that day and he realized it was exactly a year since he and the others had walked back to the caves while Bemmon swung on the limb behind them.It was even the same time of day; the blue sun rising in the east behind him and the yellow sun bright in his face as it touched the western horizon before him. He remembered how the yellow sun had been like the front sight of a rifle, set in the deepest V notch of the western hills—But now, exactly a year later, it was not in the V notch. It was on the north side of the notch.He looked to the east, at the blue sun. It seemed to him that it, too, was farther north than it had been although with it he had no landmark to check by.But there was no doubt about the yellow sun: it was going south, as it should at that time of year, but it was lagging behind schedule. The only explanation Lake could think of was one that would mean still another threat to their survival; perhaps greater than all the others combined.The yellow sun dropped completely behind the north slope of the V notch and he went on to the caves. He found Craig and Anders, the only two who might know anything about Ragnarok's axial tilts, and told them what he had seen."I made the calendar from the data John gave me," Anders said. "The Dunbar men made observations and computed the length of Ragnarok's year—I don't think they would have made any mistake.""If they didn't," Lake said, "we're in for something."Craig was watching him, closely, thoughtfully. "Like the Ice Ages of Earth?" he asked.Lake nodded and Anders said, "I don't understand.""Each year the north pole tilts toward the sun to give us summer and away from it to give us winter," Lake said. "Which, of course, you know. But there can be still another kind of axial tilt. On Earth it occurs at intervals of thousands of years. The tilting that produces the summers and winters goes on as usual but as the centuries go by the summer tilt toward the sun grows less, the winter tilt away from it greater. The north pole leans farther and farther from the sun and ice sheets come down out of the north—an Ice Age. Then the north pole's progression away from the sun stops and the ice sheets recede as it tilts back toward the sun.""I see," Anders said. "And if the same thing is happening here, we're going away from an ice age but at a rate thousands of times faster than on Earth.""I don't know whether it's Ragnarok's tilt, alone, or if the orbits of the suns around each other add effects of their own over a period of years," Lake said. "The Dunbar Expedition wasn't here long enough to check up on anything like that.""It seemed to me it was hotter this summer than last," Craig said. "Maybe only my imagination—but it won't be imagination in a few years if the tilt toward the sun continues.""The time would come when we'd have to leave here," Lake said. "We'd have to go north up the plateau each spring. There's no timber there—nothing but grass and wind and thin air. We'd have to migrate south each fall.""Yes . . . migrate." Anders's face was old and weary in the harsh reflected light of the blue sun and his hair had turned almost white in the past year. "Only the young ones could ever adapt enough to go up the plateau to its north portion. The rest of us . . . but we haven't many years, anyway. Ragnarok is for the young—and if they have to migrate back and forth like animals just to stay alive they will never have time to accomplish anything or be more than stone age nomads.""I wish we could know how long the Big Summer will be that we're going into," Craig said. "And how long and cold the Big Winter, when Ragnarok tilts away from the sun. It wouldn't change anything—but I'd like to know.""We'll start making and recording daily observations," Lake said. "Maybe the tilt will start back the other way before it's too late."* * *Fall seemed to come a little later that year. Craig went to the south as soon as the weather permitted but there were no minerals there; only the metal-barren hills dwindling in size until they became a prairie that sloped down and down toward the southern lowlands where all the creatures of Ragnarok spent the winter."I'll try again to the north when spring comes," Craig said. "Maybe that mountain on the plateau will have something."Winter came, and Elaine died in giving him a son. The loss of Elaine was an unexpected blow; hurting more than he would ever have thought possible.But he had a son . . . and it was his responsibility to do whatever he could to insure the survival of his son and of the sons and daughters of all the others.His outlook altered and he began to think of the future, not in terms of years to come but in terms of generations to come. Someday one of the young ones would succeed him as leader but the young ones would have only childhood memories of Earth. He was the last leader who had known Earth and the civilization of Earth as a grown man. What he did while he was leader would incline the destiny of a new race.He would have to do whatever was possible for him to do and he would have to begin at once. The years left to him could not be many.He was not alone; others in the caves had the same thoughts he had regarding the future even though none of them had any plan for accomplishing what they spoke of. West, who had held degrees in philosophy on Earth, said to Lake one night as they sat together by the fire:"Have you noticed the way the children listen when the talk turns to what used to be on Earth, what might have been on Athena, and what would be if only we could find a way to escape Ragnarok?""I've noticed," he said."These stories already contain the goal for the future generations," West went on. "Someday, somehow, they will go to Athena, to kill the Gerns there and free the Terran slaves and reclaim Athena as their own."He had listened to them talk of the interstellar flight to Athena as they sat by their fires and worked at making bows and arrows. It was only a dream they held, yet without that dream there would be nothing before them but the vision of generation after generation living and dying on a world that could never give them more than existence.The dream was needed. But it, alone, was not enough. How long, on Earth, had it been from the Neolithic age to advanced civilization—how long from the time men were ready to leave their caves until they were ready to go to the stars?Twelve thousand years.There were men and women among the Rejects who had been specialists in various fields. There were a few books that had survived the trampling of the unicorns and others could be written with ink made from the black lance tree bark upon parchment made from the thin inner skin of unicorn hides.The knowledge contained in the books and the learning of the Rejects still living should be preserved for the future generations. With the help of that learning perhaps they really could, someday, somehow, escape from their prison and make Athena their own.He told West of what he had been thinking. "We'll have to start a school," he said. "This winter—tomorrow."West nodded in agreement. "And the writings should be commenced as soon as possible. Some of the textbooks will require more time to write than Ragnarok will give the authors."A school for the children was started the next day and the writing of the books began. The parchment books would serve two purposes. One would be to teach the future generations things that would not only help them survive but would help them create a culture of their own as advanced as the harsh environment and scanty resources of Ragnarok permitted. The other would be to warn them of the danger of a return of the Gerns and to teach them all that was known about Gerns and their weapons.Lake's main contribution would be a lengthy book: TERRAN SPACESHIPS; TYPES AND OPERATION. He postponed its writing, however, to first produce a much smaller book but one that might well be more important: INTERIOR FEATURES OF A GERN CRUISER. Terran Intelligence knew a little about Gern cruisers and as second-in-command of the Constellation he had seen and studied a copy of that report. He had an excellent memory for such things, almost photographic, and he wrote the text and drew a multitude of sketches.He shook his head ruefully at the result. The text was good but, for clarity, the accompanying illustrations should be accurate and in perspective. And he was definitely not an artist.He discovered that Craig could take a pen in his scarred, powerful hand and draw with the neat precision of a professional artist. He turned the sketches over to him, together with the mass of specifications. Since it might someday be of such vital importance, he would make four copies of it. The text was given to a teen-age girl, who would make three more copies of it . . . Four days later Schroeder handed Lake a text with some rough sketches. The title was: OPERATION OF GERN BLASTERS.Not even Intelligence had ever been able to examine a Gern hand blaster. But a man named Schrader, on Venus, had killed a Gern with his own blaster and then disappeared with both infuriated Gerns and Gern-intimidated Venusian police in pursuit. There had been a high reward for his capture . . . He looked it over and said, "I was counting on your giving us this."Only the barest trace of surprise showed on Schroeder's face but his eyes were intently watching Lake. "So you knew all the time who I was?""I knew.""Did anyone else on the Constellation know?""You were recognized by one of the ship's officers. You would have been tried in two more days.""I see," Schroeder said. "And since I was guilty and couldn't be returned to Earth or Venus I'd have been executed on the Constellation." He smiled sardonically. "And you, as second-in-command, would have been my execution's master of ceremonies."Lake put the parchment sheets back together in their proper order. "Sometimes," he said, "a ship's officer has to do things that are contrary to all his own wishes."Schroeder drew a deep breath, his face somber with the memories he had kept to himself."It was two years ago when the Gerns were still talking friendship to the Earth government while they shoved the colonists around on Venus. This Gern . . . there was a girl there and he thought he could do what he wanted to her because he was a mighty Gern and she was nothing. He did. That's why I killed him. I had to kill two Venusian police to get away—that's where I put the rope around my neck.""It's not what we did but what we do that we'll live or die by on Ragnarok," Lake said. He handed Schroeder the sheets of parchment. "Tell Craig to make at least four copies of this. Someday our knowledge of Gern blasters may be something else we'll live or die by."* * *The school and writing were interrupted by the spring hunting. Craig made his journey to the Plateau's snowcapped mountain but he was unable to keep his promise to prospect it. The plateau was perhaps ten thousand feet in elevation and the mountain rose another ten thousand feet above the plateau. No human could climb such a mountain in a 1.5 gravity."I tried," he told Lake wearily when he came back. "Damn it, I never tried harder at anything in my life. It was just too much for me. Maybe some of the young ones will be better adapted and can do it when they grow up."Craig brought back several sheets of unusually transparent mica, each sheet a foot in diameter, and a dozen large water-clear quartz crystals."Float, from higher up on the mountain," he said. "The mica and crystals are in place up there if we could only reach them. Other minerals, too—I panned traces in the canyon bottoms. But no iron."Lake examined the sheets of mica. "We could make windows for the outer caves of these," he said. "Have them double thickness with a wide air space between, for insulation. As for the quartz crystals . . .""Optical instruments," Craig said. "Binoculars, microscopes—it would take us a long time to learn how to make glass as clear and flawless as those crystals. But we have no way of cutting and grinding them."Craig went to the east that fall and to the west the next spring. He returned from the trip to the west with a twisted knee that would never let him go prospecting again."It will take years to find the metals we need," he said. "The indications are that we never will but I wanted to keep on trying. Now, my damned knee has me chained to these caves . . ."He reconciled himself to his lameness and confinement as best he could and finished his textbook: GEOLOGY AND MINERAL IDENTIFICATION.He also taught a geology class during the winters. It was in the winter of the year four on Ragnarok that a nine-year-old boy entered his class; the silent, scar-faced Billy Humbolt.He was by far the youngest of Craig's students, and the most attentive. Lake was present one day when Craig asked, curiously:"It's not often a boy your age is so interested in mineralogy and geology, Billy. Is there something more than just interest?""I have to learn all about minerals," Billy said with matter-of-fact seriousness, "so that when I'm grown I can find the metals for us to make a ship.""And then?" Craig asked."And then we'd go to Athena, to kill the Gerns who caused my mother to die, and my grandfather, and Julia, and all the others. And to free my father and the other slaves if they're still alive.""I see," Craig said.He did not smile. His face was shadowed and old as he looked at the boy and beyond him; seeing again, perhaps, the frail blonde girl and the two children that the first quick, violent months had taken from him."I hope you succeed," he said. "I wish I was young so I could dream of the same thing. But I'm not . . . so let's get back to the identification of the ores that will be needed to make a ship to go to Athena and to make blasters to kill Gerns after you get there."Lake had a corral built early the following spring, with camouflaged wings, to trap some of the woods goats when they came. It would be an immense forward step toward conquering their new environment if they could domesticate the goats and have goat herds near the caves all through the year. Gathering enough grass to last a herd of goats through the winter would be a problem—but first, before they worried about that, they would have to see if the goats could survive the summer and winter extremes of heat and cold.They trapped ten goats that spring. They built them brush sunshades—before summer was over the winds would have stripped the trees of most of their dry, brown leaves—and a stream of water was diverted through the corral.It was all work in vain. The goats died from the heat in early summer, together with the young that had been born.When fall came they trapped six more goats. They built them shelters that would be as warm as possible and carried them a large supply of the tall grass from along the creek banks; enough to last them through the winter. But the cold was too much for the goats and the second blizzard killed them all.The next spring and fall, and with much more difficulty, they tried the experiment with pairs of unicorns. The results were the same.Which meant they would remain a race of hunters. Ragnarok would not permit them to be herdsmen.* * *The years went by, each much like the one before it but for the rapid aging of the Old Ones, as Lake and the others called themselves, and the growing up of the Young Ones. No woman among the Old Ones could any longer have children, but six more normal, healthy children had been born. Like the first two, they were not affected by the gravity as Earth-born babies had been.Among the Young Ones, Lake saw, was a distinguishable difference. Those who had been very young the day the Gerns had left them to die had adapted better than those who had been a few years older.The environment of Ragnarok had struck at the very young with merciless savagery. It had subjected them to a test of survival that was without precedent on Earth. It had killed them by the hundreds but among them had been those whose young flesh and blood and organs had resisted death by adapting to the greatest extent possible.The day of the Old Ones was almost done and the future would soon be in the hands of the Young Ones. They were the ninety unconquerables out of what had been four thousand Rejects; the first generation of what would be a new race.It seemed to Lake that the years came and went ever faster as the Old Ones dwindled in numbers at an accelerating rate. Anders had died in the sixth year, his heart failing him one night as he worked patiently in his crude little laboratory at carrying on the work started by Chiara to find a cure for the Hell Fever. Barber, trying to develop a strain of herbs that would grow in the lower elevation of the caves, was killed by a unicorn as he worked in his test plot below the caves. Craig went limping out one spring day on the eighth year to look at a new mineral a hunter had found a mile from the caves. A sudden cold rain blew up, chilling him before he could return, and he died of Hell Fever the same day.Schroeder was killed by prowlers the same year, dying with his back to a tree and a bloody knife in his hand. It was the way he would have wanted to go—once he had said to Lake:"When my time comes I would rather it be against the prowlers. They fight hard and kill quick and then they're through with you. They don't tear you up after you're dead and slobber and gloat over the pieces, the way the unicorns do."The springs came a little earlier each year, the falls a little later, and the observations showed the suns progressing steadily northward. But the winters, though shorter, were seemingly as cold as ever. The long summers reached such a degree of heat on the ninth year that Lake knew they could endure no more than two or three years more of the increasing heat.Then, in the summer of the tenth year, the tilting of Ragnarok—the apparent northward progress of the suns—stopped. They were in the middle of what Craig had called Big Summer and they could endure it—just barely. They would not have to leave the caves.The suns started their drift southward. The observations were continued and carefully recorded. Big Fall was coming and behind it would be Big Winter.Big Winter . . . the threat of it worried Lake. How far to the south would the suns go—how long would they stay? Would the time come when the plateau would be buried under hundreds of feet of snow and the caves enclosed in glacial ice?There was no way he could ever know or even guess. Only those of the future would ever know.On the twelfth year only Lake and West were left of the Old Ones. By then there were eighty-three left of the Young Ones, eight Ragnarok-born children of the Old Ones and four Ragnarok-born children of the Young Ones. Not counting himself and West, there were ninety-five of them.It was not many to be the beginnings of a race that would face an ice age of unknown proportions and have over them, always, the threat of a chance return of the Gerns.The winter of the fifteenth year came and he was truly alone, the last of the Old Ones. White-haired and aged far beyond his years, he was still leader. But that winter he could do little other than sit by his fire and feel the gravity dragging at his heart. He knew, long before spring, that it was time he chose his successor.He had hoped to live to see his son take his place—but Jim was only thirteen. Among the others was one he had been watching since the day he told Craig he would find metals to build a ship and kill the Gerns: Bill Humbolt.Bill Humbolt was not the oldest among those who would make leaders but he was the most versatile of them all, the most thoughtful and stubbornly determined. He reminded Lake of that fierce old man who had been his grandfather and had it not been for the scars that twisted his face into grim ugliness he would have looked much like him.A violent storm was roaring outside the caves the night he told the others that he wanted Bill Humbolt to be his successor. There were no objections and, without ceremony and with few words, he terminated his fifteen years of leadership.He left the others, his son among them, and went back to the cave where he slept. His fire was low, down to dying embers, but he was too tired to build it up again. He lay down on his pallet and saw, with neither surprise nor fear, that his time was much nearer than he had thought. It was already at hand.He lay back and let the lassitude enclose him, not fighting it. He had done the best he could for the others and now the weary journey was over.His thoughts dissolved into the memory of the day fifteen years before. The roaring of the storm became the thunder of the Gern cruisers as they disappeared into the gray sky. Four thousand Rejects stood in the cold wind and watched them go, the children not yet understanding that they had been condemned to die. Somehow, his own son was among them—He tried feebly to rise. There was work to do—a lot of work to do . . .  
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