There was enough that year to feed the mockers all winter, supply next year's seeds, and leave enough that it could be ground and baked into bread for all to taste.

It tasted strange, but good. It was, Schroeder thought, symbolic of a great forward step. It was the first time in generations that any of them had known any food but meat.

The corn would make them less dependent upon hunting and, of paramount importance, it was the type of food to which they would have to become accustomed in the future- they could not carry herds of woods goats and unicorns with them on Gern battle cruisers.

The lack of metals hindered them wherever they turned in their efforts to build even the simplest machines or weapons. Despite its dubious prospects, however, they made a rifle-like gun.

The barrel of it was thick, of the hardest, toughest ceramic material they could produce. It was a c.u.mbersome, heavy thing, firing with a flintlock action, and it could not be loaded with much powder lest the charge burst the barrel.

The flintlock ignition was not instantaneous, the light-weight porcelain bullet had far less penetrating power than an arrow, and the thing boomed and belched out a cloud of smoke that would have shown the Gerns exactly where the shooter was located.

It was an interesting curio and the firing of it was something spectacular to behold but it was a weapon apt to be much more dangerous to the man behind it than to the Gern it was aimed at. Automatic crossbows were far better.

Woods goats had been trapped and housed during the summers in shelters where sprays of water maintained a temperature cool enough for them to survive. Only the young were kept when fall came, to be sheltered through the winter in one of the caves.

Each new generation was subjected to more heat in the summer and more cold in the winter than the generation before it and by the year one hundred and sixty the woods goats were well on their way toward adaptation.

The next year they trapped two unicorns, to begin the job of adapting and taming future generations of them. If they succeeded they would have utilized the resources of Ragnarok to the limit-except for what should be their most valuable ally with which to fight the Gerns: the prowlers.

For twenty years prowlers had observed a truce wherein they would not go hunting for men if men would stay away from their routes of travel. But it was a truce only and there was no indication that it could ever evolve into friendship.

Three times in the past, half-grown prowlers had been captured and caged in the hope of taming them. Each time they had paced their cages, looking longingly into the distance, refusing to eat and defiant until they died.

To prowlers, as to some men, freedom was more precious than life. And each time a prowler had been captured the free ones had retaliated with a resurgence of savage attacks.

There seemed no way that men and prowlers could ever meet on common ground.

They were alien to one another, separated by the gulf of an origin on worlds two hundred and fifty light-years apart. Their only common heritage was the will of each to battle.

But in the spring of one hundred and sixty-one, for a little while one day, the gulf was bridged.

Schroeder was returning from a trip he had taken alone to the east, coming down the long canyon that led from the high face of the plateau to the country near the caves. He hurried, glancing back at the black clouds that had gathered so quickly on the mountain behind him. Thunder rumbled from within them, an almost continuous roll of it as the clouds poured down their deluge of water.

A cloudburst was coming and the sheer-walled canyon down which he hurried had suddenly become a death trap, its sunlit quiet soon to be transformed into roaring destruction. There was only one place along its nine-mile length where he might climb out and the time was already short in which to reach it.

He had increased his pace to a trot when he came to it, a talus of broken rock that sloped up steeply for thirty feet to a shelf. A ledge eleven feet high stood over the shelf and other, lower, ledges set back from it like climbing steps.

At the foot of the talus he stopped to listen, wondering how close behind him the water might be. He heard it coming, a sound like the roaring of a high wind up the canyon, and he scrambled up the talus of loose rock to the shelf at its top. The shelf was not high enough above the canyon's floor-he would be killed there-and he followed it fifty feet around a sharp bend. There it narrowed abruptly, to merge into the sheer wall of the canyon. Blind alley . . . He ran back to the top of the talus where the edge of the ledge, ragged with projections of rock, was unreachably far above him. As he did so the roaring was suddenly a crashing, booming thunder and he saw the water coming.

It swept around the bend at perhaps a hundred miles an hour, stretching from wall to wall of the canyon, the crest of it seething and slashing and towering forty sheer feet above the canyon's floor.

A prowler was running in front of it, running for its life and losing.

There was no time to watch. He leaped upward, as high as possible, his crossbow in his hand. He caught the end of the bow over one of the sharp projections of rock on the ledge's rim and began to pull himself up, afraid to hurry lest the rock cut the bowstring in two and drop him back.

It held and he stood on the ledge, safe, as the prowler flashed up the talus below.

It darted around the blind-alley shelf and was back a moment later. It saw that its only chance would be to leap up on the ledge where he stood and it tried, handicapped by the steep, loose slope it had to jump from.

It failed and fell back. It tried again, hurling itself upward with all its strength, and its claws caught fleetingly on the rough rock a foot below the rim. It began to slide back, with no time left it for a third try.

It looked up at the rim of safety that it had not quite reached and then on up at him, its eyes bright and cold with the knowledge that it was going to die and its enemy would watch it.

Schroeder dropped flat on his stomach and reached down, past the ma.s.sive black head, to seize the prowler by the back of the neck. He pulled up with all his strength and the claws of the prowler tore at the rocks as it climbed.

When it was coming up over the ledge, safe, he rolled back from it and came to his feet in one swift, wary motion, his eyes on it and his knife already in his hand. As he did so the water went past below them with a thunder that deafened. Logs and trees shot past, boulders crashed together, and things could be seen surging in the brown depths; shapeless things that had once been woods goats and the battered gray bulk of a unicorn.

He saw it all with a sideward glance, his attention on the prowler.

It stepped back from the rim of the ledge and looked at him; warily, as he looked at it.

With the wariness was something like question, and almost disbelief.

The ledge they stood on was narrow but it led out of the canyon and to the open land beyond. He motioned to the prowler to precede him and, hesitating a moment, it did so.

They climbed out of the canyon and out onto the gra.s.sy slope of the mountainside.

The roar of the water was a distant rumble there and he stopped. The prowler did the same and they watched each other again, each of them trying to understand what the thoughts of the other might be. It was something they could not know-they were too alien to each other and had been enemies too long.

Then a gust of wind swept across them, bending and rippling the tall gra.s.s, and the prowler swung away to go with it and leave him standing alone.

His route was such that it diverged gradually from that taken by the prowler. He went through a grove of trees and emerged into an open glade on the other side. Up on the ridge to his right he saw something black for a moment, already far away.

He was thirty feet from the next grove of trees when he saw the gray shadow waiting silently for his coming within them.

Unicorn!

His crossbow rattled as he jerked back the pistol grip. The unicorn charged, the underbrush crackling as it tore through it and a vine whipping like a rope from its lowered horn.

His first arrow went into its chest. It lurched, fatally wounded but still coming, and he jerked back on the pistol grip for the quick shot that would stop it.

The rock-frayed bow string broke with a singing sound and the bow end snapped harmlessly forward.

He had counted on the bow and its failure came a fraction of a second too late for him to dodge far enough. His sideward leap was short, and the horn caught him in midair, ripping across his ribs and breaking them, shattering the bone of his left arm and tearing the flesh. He was hurled fifteen feet and he struck the ground with a stunning impact, pain washing over him in a blinding wave.

Through it, dimly, he saw the unicorn fall and heard its dying trumpet blast as it called to another. He heard an answering call somewhere in the distance and then the faraway drumming of hooves.

He fought back the blindness and used his good arm to lift himself up. His bow was useless, his spear lay broken under the unicorn, and his knife was gone. His left arm swung helplessly and he could not climb the limbless lower trunk of a lance tree with only one arm.

He went forward, limping, trying to hurry to find his knife while the drumming of hooves raced toward him. It would be a battle already lost that he would make with the short knife but he would have blood for his going . . .

The gra.s.s grew tall and thick, hiding the knife until he could hear the unicorn crashing through the trees. He saw it ten feet ahead of him as the unicorn tore out from the edge of the woods thirty feet away.

It squealed, shrill with triumph, and the horn swept up to impale him. There was no time left to reach the knife, no time left for anything but the last fleeting sight of sunshine and glade and arching blue sky- Something from behind him shot past and up at the unicorn's throat, a thing that was snarling black savagery with yellow eyes blazing and white fangs slashing-the prowler!

It ripped at the unicorn's throat, swerving its charge, and the unicorn plunged past him. The unicorn swung back, all the triumph gone from its squeal, and the prowler struck again. They became a swirling blur, the horn of the unicorn swinging and stabbing and the attacks of the prowler like the swift, relentless thrusting of a rapier.

He went to his knife and when he turned back with it in his hand the battle was already over.

The unicorn fell and the prowler turned away from it. One foreleg was bathed in blood and its chest was heaving with a panting so fast that it could not have been caused by the fight with the unicorn. It must have been watching me, he thought, with a strange feeling of wonder. It was watching from the ridge and it ran all the way.

Its yellow eyes flickered to the knife in his hand. He dropped the knife in the gra.s.s and walked forward, unarmed, wanting the prowler to know that he understood; that for them in that moment the gulf of two hundred and fifty light-years did not exist.

He stopped near it and squatted in the gra.s.s to begin binding up his broken arm so the bones would not grate together. It watched him, then it began to lick at its b.l.o.o.d.y shoulder; standing so close to him that he could have reached out and touched it.

Again he felt the sense of wonder. They were alone together in the glade, he and a prowler, each caring for his hurts. There was a bond between them that for a little while made them like brothers. There was a bridge for a little while across the gulf that had never been bridged before . . .

When he had finished with his arm and the prowler had lessened the bleeding of its shoulder it took a step back toward the ridge. He stood up, knowing it was going to leave.

"I suppose the score is even now," he said to it, "and we'll never see each other again.

So good hunting-and thanks."

It made a sound in its throat; a queer sound that was neither bark nor growl, and he had the feeling it was trying to tell him something. Then it turned and was gone like a black shadow across the gra.s.s and he was alone again.

He picked up his knife and bow and began the long, painful journey back to the caves, looking again and again at the ridge behind him and thinking: They have a code of ethics. They fight for their survival-but they pay their debts.

Ragnarok was big enough for both men and prowlers. They could live together in friendship as men and dogs of Earth lived together. It might take a long time to win the trust of the prowlers but surely it could be done.

He came to the rocky trail that led to the caves and there he took a last look at the ridge behind him; feeling a poignant sense of loss and wondering if he would ever see the prowler again or ever again know the strange, wild companionship he had known that day.

Perhaps he never would . . . but the time would come on Ragnarok when children would play in the gra.s.s with prowler pups and the time would come when men and prowlers, side by side, would face the Gerns.

In the year that followed there were two incidents when a prowler had the opportunity to kill a hunter on prowler territory and did not do so. There was no way of knowing if the prowler in each case had been the one he had saved from the cloudburst or if the prowlers, as a whole, were respecting what a human had done for one of them.

Schroeder thought of again trying to capture prowler pups-very young ones-and decided it would be a stupid plan. Such an act would destroy all that had been done toward winning the trust of the prowlers. It would be better to wait, even though time was growing short, and find some other way.

The fall of one hundred and sixty-three came and the suns were noticeably moving south. That was the fall that his third child, a girl, was born. She was named Julia, after the Julia of long ago, and she was of the last generation that would be born in the caves. Plans were already under way to build a town in the valley a mile from the caves. The unicorn-proof stockade wall that would enclose it was already under construction, being made of stone blocks. The houses would be of diamond-sawed stone, thick-walled, with dead-air s.p.a.ces between the double walls to insulate against heat and cold. Tall, wide canopies of lance tree poles and the palm-like medusabush leaves would be built over all the houses to supply additional shade.

The woods goats were fully adapted that year and domesticated to such an extent that they had no desire to migrate with the wild goats. There was a small herd of them then, enough to supply a limited amount of milk, cheese and wool.

The adaptation of the unicorns proceeded in the following years, but not their domestication. It was their nature to be ill-tempered and treacherous and only the threat of the spears in the hands of their drivers forced them to work; work that they could have done easily had they not diverted so much effort each day to trying to turn on their masters and kill them. Each night they were put in a ma.s.sive-walled corral, for they were almost as dangerous as wild unicorns.

The slow, painstaking work on the transmitter continued while the suns moved farther south each year. The move from the caves to the new town was made in one hundred and seventy-nine, the year that Schroeder's wife died.

His two sons were grown and married and Julia, at sixteen, was a woman by Ragnarok standards; blue-eyed and black-haired as her mother, a Craig, had been, and strikingly pretty in a wild, reckless way. She married Will Humbolt that spring, leaving her father alone in the new house in the new town.

Four months later she came to him to announce with pride and excitement: "I'm going to have a baby in only six months! If it's a boy he'll be the right age to be leader when the Gerns come and we're going to name him John, after the John who was the first leader we ever had on Ragnarok."

Her words brought to his mind a question and he thought of what old Dale Craig, the leader who had preceded Lake, had written: We have survived, the generations that the Gerns thought would never be born. But we must never forget the characteristics that insured that survival: an unswerving loyalty of every individual to all the others and the courage to fight, and die if necessary.

In any year, now, the Gerns will come. There will be no one to help us. Those on Athena are slaves and it is probable that Earth has been enslaved by now. We will stand or fall alone. But if we of today could know that the ones who meet the Gerns will still have the courage and loyalty that made our survival possible, then we would know that the Gerns are already defeated . . .

The era of danger and violence was over for a little while. The younger generation had grown up during a time of peaceful development of their environment. It was a peace that the coming of the Gerns would shatter-but had it softened the courage and loyalty of the younger generation?

A week later he was given his answer.

He was climbing up the hill that morning, high above the town below, when he saw the blue of Julia's wool blouse in the distance. She was sitting up on a hillside, an open book in her lap and her short spear lying beside her. He frowned at the sight. The main southward migration of unicorns was over but there were often lone stragglers who might appear at any time. He had warned her that someday a unicorn would kill her-but she was reckless by nature and given to restless moods in which she could not stand the confinement of the town.

She jerked up her head as he watched, as though at a faint sound, and he saw the first movement within the trees behind her-a unicorn.

It lunged forward, its stealth abandoned as she heard it, and she came to her feet in a swift, smooth movement; the spear in her hand and the book spilling to the ground.

The unicorn's squeal rang out and she whirled to face it, with two seconds to live. He reached for his bow, knowing his help would come too late.

She did the only thing possible that might enable her to survive: she shifted her balance to take advantage of the fact that a human could jump to one side a little more quickly than a four-footed beast in headlong charge. As she did so she brought up the spear for the thrust into the vulnerable area just behind the jawbone.

It seemed the needle point of the black horn was no more than an arm's length from her stomach when she jumped aside with the lithe quickness of a prowler, swinging as she jumped and thrusting the spear with all her strength into the unicorn's neck.

The thrust was true and the spear went deep. She released it and flung herself backward to dodge the flying hooves. The force of the unicorn's charge took it past her but its legs collapsed under it and it crashed to the ground, sliding a little way before it stopped. It kicked once and lay still.

She went to it, to retrieve her spear, and even from the distance there was an air of pride about her as she walked past her bulky victim.

Then she saw the book, knocked to one side by the unicorn's hooves. Tatters of its pages were blowing in the wind and she stiffened, her face growing pale. She ran to it to pick it up, the unicorn forgotten.

She was trying to smooth the torn leaves when he reached her. It had been one of the old textbooks, printed on real paper, and it was fragile with age. She had been trusted by the librarian to take good care of it. Now, page after page was torn and unreadable . . .

She looked up at him, shame and misery on her face.

"Father," she said. "The book-I-"

He saw that the unicorn was a bull considerably larger than the average. Men had in the past killed unicorns with spears but never, before, had a sixteen-year-old girl done so .

He looked back at her, keeping his face emotionless, and asked sternly, "You what?"

"I guess-I guess I didn't have any right to take the book out of town. I wish I hadn't .

"You promised to take good care of it," he told her coldly. "Your promise was believed and you were trusted to keep it."

"But-but I didn't mean to damage it-I didn't mean to!" She was suddenly very near to tears. "I'm not a-a bemmon!"

"Go back to town," he ordered. "Tonight bring the book to the town hall and tell the council what happened to it." She swallowed and said in a faint voice, "Yes, father."

She turned and started slowly back down the hill, not seeing the unicorn as she pa.s.sed it, the b.l.o.o.d.y spear trailing disconsolately behind her and her head hanging in shame.

He watched her go and it was safe for him to smile. When night came and she stood before the council, ashamed to lift her eyes to look at them, he would have to be grim and stern as he told her how she had been trusted and how she had betrayed that trust. But now, as he watched her go down the hill, he could smile with his pride in her and know that his question was answered; that the younger generation had lost neither courage nor loyalty.

Julia saved a child's life that spring and almost lost her own. The child was playing under a half-completed canopy when a sudden, violent wind struck it and transformed it into a death-trap of cracking, falling timbers. She reached him in time to fling him to safety but the collapsing roof caught her before she could make her own escape.