A speck in the sky came swiftly downward. Great pinions spread, and flapped, and icy eyes surveyed the rocky space. With more great flappings, Semper the eagle came to ground. He folded his huge wings and turned his head jerkily, his eyes unblinking. A tiny harness held a miniature camera against his chest. He strutted over the bare stone to the highest point. He stood there, a lonely and arrogant figure in the vastness.
There came crashings and rustlings, and then snuffling sounds. Sitka Pete came lumbering out into the clear space. He wore a harness too, and a pack. The harness was complex, because it had not only to hold a pack in normal travel, but, when he stood on his hind legs, it must not hamper the use of his forepaws in combat.
He went cagily all over the open area. He peered over the edge of the spur's farthest tip. He prowled to the other side and looked down. He scouted carefully. Once he moved close to Semper and the eagle opened his great curved beak and uttered an indignant noise. Sitka paid no attention.
He relaxed, satisfied. He sat down untidily, his hind legs sprawling. He wore an air approaching benevolence as he surveyed the landscape about and below him.
More snufflings and crashings. Sourdough Charley came into view with Huyghens and Roane behind him. Sourdough carried a pack, too. Then there was a squealing and Nugget scurried up from the rear, impelled by a whack from his mother. Faro Nell appeared, with the carcass of a staglike animal lashed to her harness.
"I picked this place from a space photo," said Huyghens, "to make a directional fix from. I'll get set up."
He swung his pack from his shoulders to the ground. He extracted an obviously self-constructed device which he set on the ground. It had a whip aerial, which he extended. Then he plugged in a considerable length of flexible wire and unfolded a tiny, improvised directional aerial with an even tinier booster at its base. Roane slipped his pack from his shoulders and watched. Huyghens slipped headphones over his ears. He looked up and said sharply:
"Watch the bears, Roane. The wind's blowing up the way we came. Anything that trails us—sphexes, for example—will send its scent on before. The bears will tell us."
He busied himself with the instruments he'd brought. He heard the hissing, frying, background noise which could be anything at all except a human signal. He reached out and swung the small aerial around. Rasping, buzzing tones came in, faintly and then loudly. This receiver, though, had been made for this particular wave band. It was much more efficient than the modified space phone had been. It picked up three short buzzes, three long ones, and three short ones again. Three dots, three dashes, and three dots. Over and over again. SOS. SOS. SOS.
Huyghens took a reading and moved the directional aerial a carefully measured distance. He took another reading. He shifted it yet again and again, carefully marking and measuring each spot and taking notes of the instrument readings. When he finished, he had checked the direction of the signal not only by loudness but by phase—he had as accurate a fix as could possibly be had with portable apparatus.
Sourdough growled softly. Sitka Pete whiffed the air and arose from his sitting position. Faro Nell whacked Nugget, sending him whimpering to the farthest corner of the flea place. She stood bristling, facing down-hill the way they'd come.
"Damn!" said Huyghens.
He got up and waved his arm at Semper, who had turned his head at the stirrings. Semper squawked in a most un-eaglelike fashion and dived off the spur and was immediately fighting the down-draught beyond it. As Huyghens reached his weapon, the eagle came back overhead. He went magnificently past, a hundred feet high, careening and flapping in the tricky currents. He screamed, abruptly, and circled and screamed again. Huyghens swung a tiny vision-plate from its strap to where he could look into it. He saw, of course, what the little camera on Semper's chest could see—reeling, swaying terrain as Semper saw it, though without his breadth of field. There were moving objects to be seen through the shifting trees. Their coloring was unmistakable.
"Sphexes," said Huyghens dourly. "Eight of them. Don't look for them to follow our track, Roane. They run parallel to a trail on either side. That way they attack in breadth and all at once when they catch up. And listen! The bears can handle anything they tangle with! It's our job to pick off the loose ones! And aim for the body! The bullets explode."
He threw off the safety of his weapon. Faro Nell, uttering thunderous growls, went padding to a place between Sitka Pete and Sourdough. Sitka glanced at her and made a whuffing noise, as if derisive of her blood-curdling sounds. Sourdough grunted in a somehow solid fashion.
He and Sitka moved farther away from Nell to either side. They would cover a wider front.
There was no other sign of life than the shrillings of the incredibly tiny creatures which on this planet were birds, and Faro Nell's deep-bass, raging growls, and then the click of Roane's safety going off as he got ready to use the weapon Huyghens had given him.
Semper screamed again, flapping low above the treetops, following parti-colored, monstrous shapes beneath.
Eight blue-and-tan fiends came racing out of the underbrush. They had spiny fringes, and horns, and glaring eyes, and they looked as if they had come straight out of hell. On the instant of their appearance they leaped, emitting squalling, spitting squeals that were like the cries of fighting tomcats ten thousand times magnified. Huyghens' rifle cracked, and its sound was wiped out in the louder detonation of its bullet in sphexian flesh. A tan-and-blue monster tumbled over, shrieking. Faro Nell charged, the very impersonation of white-hot fury. Roane fired, and his bullet exploded against a tree. Sitka Pete brought his massive forepaws in a clapping, monstrous ear-boxing motion. A sphex died.
Then Roane fired again. Sourdough Charley whuffed. He fell forward upon a spitting bi-colored fiend, rolled him over, and raked with his hind claws. The belly-hide of the sphex was tenderer than the rest. The creature rolled away, snapping at its own wounds. Another sphex found itself shaken loose from the tumult about Sitka Pete. It whirled to leap on him from behind—and Huyghens fired very coldly—and two plunged upon Faro Nell and Roane blasted one and Faro Nell disposed of the other in truly awesome fury. Then Sitka Pete heaved himself erect—seeming to drip sphexes—and Sourdough waddled over and pulled one off and killed it and went back for another. And both rifles cracked together and there was suddenly nothing left to fight.
The bears prowled from one to another of the corpses. Sitka Pete rumbled and lifted up a limp head. Crash! Then another. He went over the lot, whether or not they showed signs of life. When he had finished, they were wholly still.
Semper came flapping down out of the sky. He had screamed and fluttered overhead as the fight went on. Now he landed with a rush. Huyghens went soothingly from one bear to another, calming them with his voice. It took longest to calm Faro Nell, licking Nugget with impassioned solicitude and growling horribly as she licked.
"Come along, now," said Huyghens, when Sitka showed signs of intending to sit down again. "Heave these carcasses over a cliff. Come along! Sitka! Sourdough! Hup!"
He guided them as the two big males somewhat fastidiously lifted up the nightmarish creatures they and the guns together had killed, and carried them to the edge of the spur of stone. They let the dead beasts go bouncing and sliding down into the valley.
"That," said Huyghens, "is so their little pals will gather round them and caterwaul their woe where there's no trail of ours to give them ideas. If we'd been near a river, I'd have dumped them in to float down-river and gather mourners wherever they stranded. Around the station I incinerate them. If I had to leave them, I'd make tracks away. About fifty miles upwind would be a good idea."
He opened the pack Sourdough carried and extracted giant sized swabs and some gallons of antiseptic. He tended the three Kodiaks in turn, swabbing not only the cuts and scratches they'd received, but deeply soaking their fur where there could be suspicion of spilled sphex blood.
"This antiseptic deodorizes, too," he told Roane. "Or we'd be trailed by any sphex who passed to leeward of us. When we start off, I'll swab the bears' paws for the same reason."
Roane was very quiet. He'd missed his first shot with a bullet-firing weapon—a beam hasn't the stopping-power of an explosive bullet—but he'd seemed to grow savagely angry with himself. The last few seconds of the fight, he'd fired very deliberately and every bullet hit. Now he said bitterly:
"If you're instructing me so I can carry on should you be killed, I doubt that it's worth while!"
Huyghens felt in his pack and unfolded the enlargements he'd made of the space photos of this part of the planet. He carefully oriented the map with distant landmarks. He drew a painstakingly accurate line across the photo.
"The SOS signal comes from somewhere close to the robot colony," he reported. "I think a little to the south of it. Probably from a mine they'd opened up, on the far side—of course—of the Sere Plateau. See how I've marked this map? Two fixes, one from the station and one from here. I came away off-course to get a fix here so we'd have two position-lines to the transmitter. The signal could have come from the other side of the planet. But it doesn't."
"The odds would be astronomical against other castaways," protested Roane.
"No-o-o-o," said Huyghens. "Ships have been coming here. To the robot colony. One could have crashed. And I have friends, too."
He repacked his apparatus and gestured to the bears. He led them beyond the scene of combat and very carefully swabbed off their paws, so they could not possibly leave a trail of sphex-blood scent behind them. He waved Semper, the eagle, aloft.
"Let's go," he told the Kodiaks. "Yonder! Hup!"
The party headed down-hill and into the jungle again. Now it was Sourdough's turn to take the lead, and Sitka Pete prowled more widely behind him. Faro Nell trailed the men, with Nugget. She kept an extremely sharp eye upon the cub. He was a baby, still. He only weighed six hundred pounds. And of course she watched against danger from the rear.
Overhead, Semper fluttered and flew in giant circles and spirals, never going very far away. Huyghens referred constantly to the screen which showed what the air-borne camera saw. The image tilted and circled and banked and swayed. It was by no means the best air-reconnaissance that could be imagined. But it was the best that would work. Presently Huyghens said:
"We swing to the right, here. The going's bad straight ahead, and it looks like a pack of sphexes has killed and is feeding."
Roane was upset. He was dissatisfied with himself. So he said:
"It's against reason for carnivores to be as thick as you say! There has to be a certain amount of other animal life for every meat-eating beast! Too many of them would eat all the game and starve!"
"They're gone all winter," explained Huyghens, "which around here isn't as severe as you might think. And a good many animals seem to breed just after the sphexes go south. Also, the sphexes aren't around all the warm weather. There's a sort of peak, and then for a matter of weeks you won't see a one of them, and suddenly the jungle swarms with them again. Then, presently, they head south. Apparently they're migratory in some fashion, but nobody knows." He said dryly: "There haven't been many naturalists around on this planet. The animal life is inimical."
Roane fretted. He was a senior officer in the Colonial Survey, and he was accustomed to arrival at a partly or completely-finished colonial set-up, and to pass upon the completion or noncompletion of the planned installation as designed. Now he was in an intolerably hostile environment, depending upon an illegal colonist for his life, engaged upon a demoralizingly indefinite enterprise—because the mechanical spark-signal could be working long after its constructors were dead—and his ideas about a number of matters were shaken. He was alive, for example, because of three giant Kodiak bears and a bald eagle. He and Roane could have been surrounded by ten thousand robots, and they'd have been killed. Sphexes and robots would have ignored each other, and sphexes would have made straight for the men, who'd have had less than four seconds in which to discover for themselves that they were attacked, prepare to defend themselves, and kill eight sphexes.
Roane's convictions as a civilized man were shaken. Robots were marvelous contrivances for doing the expected: accomplishing the planned; coping with the predicted. But they also had defects. Robots could only follow instructions—if this thing happens, do this, if that thing happens do that. But before something else, neither this or that, robots were helpless. So a robot civilization worked only in an environment where nothing unanticipated ever turned up, and human supervisors never demanded anything unexpected. Roane was appalled. He'd never encountered the truly unpredictable before in all his life and career.
He found Nugget, the cub, ambling uneasily in his wake. The cub flattened his ears miserably when Roane glanced at him. It occurred to the man that Nugget was receiving a lot of disciplinary thumpings from Faro Nell. He was knocked about physically, pretty much as Roane was being knocked about psychologically. His lack of information and unfitness for independent survival in this environment was being hammered into him.
"Hi, Nugget," said Roane ruefully. "I feel just about the way you do!"
Nugget brighted visibly. He frisked. He tended to gambol. He looked very hopefully up into Roane's face—and he stood four feet high at the shoulder and would overtop Roane if he stood erect.
Roane reached out and patted Nugget's head. It was the first time in all his life that he'd ever petted an animal.
He heard a snuffling sound behind him. Skin crawled at the back of his neck. He whirled.
Faro Nell regarded him—eighteen hundred pounds of she-bear only ten feet away and looking into his eyes. For one panicky instant Roane went cold all over. Then he realized that Faro Nell's eyes were not burning. She was not snarling. She did not emit those blood-curdling sounds which the bare prospect of danger to Nugget had produced up on the rocky spur. She looked at him blandly. In fact, after a moment she swung off on some independent investigation of a matter that had aroused her curiosity.
The traveling party went on, Nugget frisking beside Roane and tending to bump into him out of pure cub-clumsiness. Now and again he looked adoringly at Roane, in the instant and overwhelming affection of the very young.
Roane trudged on. Presently he glanced behind again. Faro Nell was now ranging more widely. She was well satisfied to have Nugget in the immediate care of a man. From time to time he got on her nerves.
A little while later, Roane called ahead.
"Huyghens! Look here! I've been appointed nursemaid to Nugget!"
Huyghens looked back.
"Oh, slap him a few times and he'll go back to his mother."
"The devil I will!" said Roane querulously. "I like it!"
The traveling party went on.
When night fell, they camped. There could be no fire, of course, because all the minute night-things about would come eagerly to dance in the glow. But there could not be darkness, equally, because night-walkers hunted in the dark. So Huyghens set out the barrier lamps which made a wall of twilight about their halting place, and the staglike creature Faro Nell had carried became their evening meal. Then they slept—at least the men did—and the bears dozed and snorted and waked and dozed again. But Semper sat immobile with his head under his wing on a tree limb. And presently there was a glorious cool hush and all the world glowed in morning light diffused through the jungle by a newly risen sun. And they arose, and traveled again.
This day they stopped stock-still for two hours while sphexes puzzled over the trail the bears had left. Huyghens discoursed calmly on the need for an anti-scent, to be used on the boots of men and the paws of bears, which would make the following of their trails unpopular with sphexes. And Roane seized upon the idea and absorbedly suggested that a sphex-repellent odor might be worked out, which would make a human revolting to a sphex. If that were done—why—humans could go freely about unmolested.
"Like stink-bugs," said Huyghens, sardonically. "A very intelligent idea! Very rational! You can feel proud!"
And suddenly Roane, very obscurely, was not proud of the idea at all.
They camped again. On the third night they were at the base of that remarkable formation, the Sere Plateau, which from a distance looked like a mountain-range but was actually a desert tableland. And it was not reasonable for a desert to be raised high, while lowlands had rain, but on the fourth morning they found out why. They saw, far, far away, a truly monstrous mountain-mass at the end of the long-way expanse of the plateau. It was like the prow of a ship. It lay, so Huyghens observed, directly in line with the prevailing winds, and divided them as a ship's prow divides the waters. The moisture-bearing air-currents flowed beside the plateau, not over it, and its interior was pure sere desert in the unscreened sunshine of high altitudes.
It took them a full day to get halfway up the slope. And here, twice as they climbed, Semper flew screaming over aggregations of sphexes to one side of them or the other. These were much larger groups than Huyghens had ever seen before—fifty to a hundred monstrosities together, where a dozen was a large hunting-pack elsewhere. He looked in the screen which showed him what Semper saw, four to five miles away. The sphexes padded uphill toward the Sere Plateau in a long line. Fifty—sixty—seventy tan-and-azure beasts out of hell.
"I'd hate to have that bunch jump us," he said candidly to Roane. "I don't think we'd stand a chance."
"Here's where a robot tank would be useful," Roane observed.
"Anything armored," conceded Huyghens. "One man in an armored station like mine would be safe. But if he killed a sphex he'd be besieged. He'd have to stay holed up, breathing the smell of dead sphex, until the odor had gone away. And he mustn't kill any others or he'd be besieged until winter came."
Roane did not suggest the advantages of robots in other directions. At that moment, for example, they were working their way up a slope which averaged fifty degrees. The bears climbed without effort despite their burdens. For the men it was infinite toil. Semper, the eagle, manifested impatience with bears and men alike, who crawled so slowly up an incline over which he soared.
He went ahead up the mountainside and teetered in the air-currents at the plateau's edge. Huyghens looked in the vision-plate by which he reported.
"How the devil," panted Roane—they had stopped for a breather, and the bears waited patiently for them—"do you train bears like these? I can understand Semper."
"I don't train them," said Huyghens, staring into the plate. "They're mutations. In heredity the sex-linkage of physical characteristics is standard stuff. But there's been some sound work done on the gene-linkage of psychological factors. There was need, on my home planet, for an animal who could fight like a fiend, live off the land, carry a pack and get along with men at least as well as dogs do. In the old days they'd have tried to breed the desired physical properties into an animal who already had the personality they wanted. Something like a giant dog, say. But back home they went at it the other way about. They picked the wanted physical characteristics and bred for the personality—the psychology. The job got done over a century ago—a Kodiak bear named Kodius Champion was the first real success. He had everything that was wanted. These bears are his descendants."
"They look normal," commented Roane.
"They are!" said Huyghens warmly. "Just as normal as an honest dog! They're not trained, like Semper. They train themselves!" He looked back into the plate in his hands, which showed the ground five and six and seven thousand feet higher. "Semper, now, is a trained bird without too much brains. He's educated—a glorified hawk. But the bears want to get along with men. They're emotionally dependent on us! Like dogs. Semper's a servant, but they're companions and friends. He's trained, but they're loyal. He's conditioned. They love us. He'd abandon me if he ever realized he could—he thinks he can only eat what men feed him. But the bears wouldn't want to. They like us. I admit that I like them. Maybe because they like me."
Roane said deliberately:
"Aren't you a trifle loose-tongued, Huyghens? I'm a Colonial Survey officer. I have to arrest you sooner or later. You've told me something that will locate and convict the people who set you up here. It shouldn't be hard to find where bears were bred for psychological mutations, and where a bear named Kodius Champion left descendants! I can find out where you came from now, Huyghens!"
Huyghens looked up from the plate with its tiny swaying television image, relayed from where Semper floated impatiently in mid-air.
"No harm done," he said amiably. "I'm a criminal there, too. It's officially on record that I kidnaped these bears and escaped with them. Which, on my home planet, is about as heinous a crime as a man can commit. It's worse than horse-theft back on Earth in the old days. The kin and cousins of my bears are highly thought of. I'm quite a criminal, back home."
Roane stared.
"Did you steal them?" he demanded.
"Confidentially," said Huyghens. "No. But prove it!" Then he said: "Take a look in this plate. See what Semper can see up at the plateau's edge."
Roane squinted aloft, where the eagle flew in great sweeps and dashes. Somehow, by the experience of the past few days, Roane knew that Semper was screaming fiercely as he flew. He made a dart toward the plateau's border.
Roane looked at the transmitted picture. It was only four inches by six, but it was perfectly without grain and in accurate color. It moved and turned as the camera-bearing eagle swooped and circled. For an instant the screen showed the steeply sloping mountainside, and off at one edge the party of men and bears could be seen as dots. Then it swept away and showed the top of the plateau.
There were sphexes. A pack of two hundred trotted toward the desert interior. They moved at leisure, in the open. The viewing camera reeled, and there were more. As Roane watched and as the bird flew higher, he could see still other sphexes moving up over the edge of the plateau from a small erosion-defile here and another one there. The Sere Plateau was alive with the hellish creatures. It was inconceivable that there should be game enough for them to live on. They were visible as herds of cattle would be visible on grazing planets.
It was simply impossible.
"Migrating," observed Huyghens. "I said they did. They're headed somewhere. Do you know, I doubt that it would be healthy for us to try to cross the plateau through such a swarm of sphexes?"
Roane swore, in abrupt change of mood.
"But the signal's still coming through! Somebody's alive over at the robot colony! Must we wait till the migration's over?"
"We don't know," Huyghens pointed out, "that they'll stay alive. They may need help badly. We have to get to them. But at the same time—"
He glanced at Sourdough Charley and Sitka Pete, clinging patiently to the mountainside while the men rested and talked. Sitka had managed to find a place to sit down, though one massive paw anchored him in his place.
Huyghens waved his arm, pointing in a new direction.
"Let's go!" he called briskly. "Let's go! Yonder! Hup!"
IV
They followed the slopes of the Sere Plateau, neither ascending to its level top—where sphexes congregated—nor descending into the foothills where sphexes assembled. They moved along hillsides and mountain-flanks which sloped anywhere from thirty to sixty degrees, and they did not cover much distance. They practically forgot what it was to walk on level ground. Semper, the eagle, hovered overhead during the daytime, not far away. He descended at nightfall for his food from the pack of one of the bears.
"The bears aren't doing too well for food," said Huyghens dryly. "A ton of bear needs a lot to eat. But they're loyal to us. Semper hasn't any loyalty. He's too stupid. But he's been conditioned to think that he can only eat what men feed him. The bears know better, but they stick to us regardless. I rather like these bears."
It was the most self-evident of understatements. This was at an encampment on the top of a massive boulder which projected from a mountainous stony wall. This was six days from the start of their journey. There was barely room on the boulder for all the party. And Faro Nell fussily insisted that Nugget should be in the safest part, which meant near the mountain-flank. She would have crowded the men outward, but Nugget whimpered for Roane. Wherefore, when Roane moved to comfort him, Faro Nell contentedly drew back and snorted at Sitka and Sourdough and they made room for her near the edge.
It was a hungry camp. They had come upon tiny rills upon occasion, flowing down the mountain side. Here the bears had drunk deeply and the men had filled canteens. But this was the third night, and there had been no game at all. Huyghens made no move to bring out food for Roane or himself. Roane made no comment. He was beginning to participate in the relationship between bears and men, which was not the slavery of the bears but something more. It was two-way. He felt it.
"It would seem," he said fretfully, "that since the sphexes don't seem to hunt on their way uphill, that there should be some game. They ignore everything as they file uphill."
This was true enough. The normal fighting formation of sphexes was line abreast, which automatically surrounded anything which offered to flee and outflanked anything which offered fight. But here they ascended the mountain in long lines, one after the other, following apparently long-established trails. The wind blew along the slopes and carried scent only sidewise. But the sphexes were not diverted from their chosen paths. The long processions of hideous blue-and-tawny creatures—it was hard to think of them as natural beasts, male and female and laying eggs like reptiles on other planets—simply climbed.
"There've been other thousands of beasts before them," said Huyghens. "They must have been crowding this way for days or even weeks. We've seen tens of thousands in Semper's camera. They must be uncountable, altogether. The first-comers ate all the game there was, and the last-comers have something else on whatever they use for minds."
Roane protested:
"But so many carnivores in one place is impossible! I know they are here, but they can't be!"
"They're cold-blooded," Huyghens pointed out. "They don't burn food to sustain body-temperature. After all, lots of creatures go for long periods without eating. Even bears hibernate. But this isn't hibernation—or estivation, either."
He was setting up the radiation-wave receiver in the darkness. There was no point in attempting a fix here. The transmitter was on the other side of the Sere Plateau, which inexplicably swarmed with the most ferocious and deadly of all the creatures of Loren Two. The men and bears would commit suicide by crossing here.
But Huyghens turned on the receiver. There came the whispering, scratchy sound of background-noise. Then the signal. Three dots, three dashes, three dots. Three dots, three dashes, three dots. It went on and on and on. Huyghens turned it off. Roane said:
"Shouldn't we have answered that signal before we left the station? To encourage them?"
"I doubt they have a receiver," said Huyghens. "They won't expect an answer for months, anyhow. They'd hardly listen all the time, and if they're living in a mine-tunnel and trying to sneak out for food to stretch their supplies—why, they'll be too busy to try to make complicated recorders or relays."
Roane was silent for a moment or two.
"We've got to get food for the bears," he said presently. "Nugget's weaned, and he's hungry."
"We will," Huyghens promised. "I may be wrong, but it seems to me that the number of sphexes climbing the mountain is less than yesterday and the day before. We may have just about crossed the path of their migration. They're thinning out. When we're past their trail, we'll have to look out for night-walkers and the like again. But I think they wiped out all animal life on their migration-route."
He was not quite right. He was waked in darkness by the sound of slappings and the grunting of bears. Feather-light puffs of breeze beat upon his face. He struck his belt-lamp sharply and the world was hidden by a whitish film which snatched itself away. Something flapped. Then he saw the stars and the emptiness on the edge of which they camped. Then big white things flapped toward him.
Sitka Pete whuffed mightily and swatted. Faro Nell grunted and swung. She caught something in her claws. She crunched. The light went off as Huyghens realized. Then he said:
"Don't shoot, Roane!" He listened, and heard the sounds of feeding in the dark. It ended. "Watch this!" said Huyghens.
The belt-light came on again. Something strangely-shaped and pallid like human skin reeled and flapped crazily toward him. Something else. Four. Five—ten—twenty—more....
A huge hairy paw reached up into the light-beam and snatched a flying thing out of it. Another great paw. Huyghens shifted the light and the three great Kodiaks were on their hind legs, swatting at creatures which flittered insanely, unable to resist the fascination of the glaring lamp. Because of their wild gyrations it was impossible to see them in detail, but they were those unpleasant night-creatures which looked like plucked flying monkeys but were actually something quite different.
The bears did not snarl or snap. They swatted, with a remarkable air of businesslike competence and purpose. Small mounds of broken things built up about their feet.
Suddenly there were no more. Huyghens snapped off the light. The bears crunched and fed busily in the darkness.
"Those things are carnivoresandblood-suckers, Roane," said Huyghens calmly. "They drain their victims of blood like vampire bats—they've some trick of not waking them—and when they're dead the whole tribe eats. But bears have thick furs, and they wake when they're touched. And they're omnivorous—they'll eat anything but sphexes, and like it. You might say that those night-creatures came to lunch. But they stayed. They are it—for the bears, who are living off the country as usual."
Roane uttered a sudden exclamation. He made a tiny light, and blood flowed down his hand. Huyghens passed over his pocket kit of antiseptic and bandages. Roane stanched the bleeding and bound up his hand. Then he realized that Nugget chewed on something. When he turned the light, Nugget swallowed convulsively. It appeared that he had caught and devoured the creature which had drawn blood from Roane. But Roane had lost none to speak of, at that.
In the morning they started along the sloping scarp of the plateau once more. During the morning, Roane said painfully:
"Robots wouldn't have handled those vampire-things, Huyghens."
"Oh, they could be built to watch for them," said Huyghens, tolerantly. "But you'd have to swat for yourself. I prefer the bears."
He led the way on. Here their jungle-formation could not apply. On a steep slope the bears ambled comfortably, the tough pads of their feet holding fast on the slanting rock, but the men struggled painfully. Twice Huyghens halted to examine the ground about the mountains' bases through binoculars. He looked encouraged as they went on. The monstrous peak which was like the bow of a ship at the end of the Sere Plateau was visibly nearer. Toward midday, indeed, it looked high above the horizon, no more than fifteen miles away. And at midday Huyghens called a final halt.
"No more congregations of sphexes down below," he said cheerfully, "and we haven't seen a climbing line of them in miles." The crossing of a sphex-trail meant simply waiting until one party had passed, and then crossing before another came in view. "I've a hunch we've crossed their migration-route. Let's see what Semper tells us!"
He waved the eagle aloft. And Semper, like all creatures other than men, normally functioned only for the satisfaction of his appetite, and then tended to loaf or sleep. He had ridden the last few miles perched on Sitka Pete's pack. Now he soared upward and Huyghens watched in the small vision-plate.
Semper went soaring—and the image on the plate swayed and turned and turned—and in minutes was above the plateau's edge. And here there was some vegetation and the ground rolled somewhat, and there were even patches of brush. But as Semper towered higher still, the inner desert appeared. But nearby it was clear of beasts. Only once, when the eagle banked sharply and the camera looked along the long dimension of the plateau, did Huyghens see any sign of the blue-and-tan beasts. There he saw what looked like masses amounting to herds. But, of course, carnivores do not gather in herds.
"We go straight up," said Huyghens in satisfaction. "We cross the plateau here—and we can edge down-wind a bit, even. I think we'll find something interesting on our way to your robot colony."
He waved to the bears to go ahead uphill.
They reached the top hours later—barely before sunset. And they saw game. Not much, but game at the grassy, brushy border of the desert. Huyghens brought down a shaggy ruminant which surely would not live on a desert. When night fell there was an abrupt chill in the air. It was much colder than night-temperatures on the slopes. The air was thin. Roane thought confusedly and presently guessed at the cause. In the lee of the prow-mountain the air was calm. There were no clouds. The ground radiated its heat to empty space. It could be bitterly cold in the nighttime, here.
"And hot by day," Huyghens agreed when he mentioned it. "The sunshine's terrifically hot where the air is thin, but on most mountains there's wind. By day, here, the ground will tend to heat up like the surface of a planet without atmosphere. It may be a hundred and forty or fifty degrees on the sand at midday. But it should be cold at night."
It was. Before midnight Huyghens built a fire. There could be no danger of night-walkers where the temperature dropped to freezing.
In the morning the men were stiff with cold, but the bears snorted and moved about briskly. They seemed to revel in the morning chill. Sitka and Sourdough Charley, in fact, became festive and engaged in a mock fight, whacking each other with blows that were only feigned, but would have crushed in the skull of any man. Nugget sneezed with excitement as he watched them. Faro Nell regarded them with female disapproval.
They went on. Semper seemed sluggish. After a single brief flight he descended and rode on Sitka's pack, as on the previous day. He perched there, surveying the landscape as it changed from semi-arid to pure desert in their progress. His air was arrogant. But he would not fly. Soaring birds do not like to fly when there are no winds to make currents of which to take advantage. On the way, Huyghens painstakingly pointed out to Roane exactly where they were on the enlarged photograph taken from space, and the exact spot from which the distress-signal seemed to come.
"You're doing it in case something happens to you," said Roane. "I admit it's sense, but—what could I do to help those survivors even if I got to them, without you?"
"What you've learned about sphexes would help," said Huyghens. "The bears would help. And we left a note back at my station. Whoever grounds at the landing field back there—and the beacon's working again—will find instructions to come to the place we're trying to reach."
Roane plodded alongside him. The narrow non-desert border of the Sere Plateau was behind them, now. They marched across powdery desert sand.
"See here," said Roane, "I want to know something! You tell me you're listed as a bear-thief on your home planet. You tell me it's a lie—to protect your friends from prosecution by the Colonial Survey. You're on your own, risking your life every minute of every day. You took a risk in not shooting me. Now you're risking more in going to help men who'd have to be witnesses that you were a criminal. What are you doing it for?"
Huyghens grinned.
"Because I don't like robots. I don't like the fact that they're subduing men—making men subordinate to them."
"Go on," insisted Roane. "I don't see why disliking robots should make you a criminal. Nor men subordinating themselves to robots, either!"
"But they are," said Huyghens mildly. "I'm a crank, of course. But—I live like a man on this planet. I go where I please and do what I please. My helpers, the bears, are my friends. If the robot colony had been a success, would the humans in it have lived like men? Hardly! They'd have to live the way the robots let them! They'd have to stay inside a fence the robots built. They'd have to eat foods that robots could raise, and no others. Why—a man couldn't move his bed near a window, because if he did the house-tending robots couldn't work! Robots would serve them—the way the robots determined—but all they'd get out of it would be jobs servicing the robots!"
Roane shook his head.
"As long as men want robot service, they have to take the service that robots can give. If you don't want those services—"
"I want to decide what I want," said Huyghens, again mildly, "instead of being limited to choose among what I'm offered. On my home planet we halfway tamed it with dogs and guns. Then we developed the bears, and we finished the job with them. Now there's population-pressure and the room for bears and dogs—and men—is dwindling. More and more people are being deprived of the power of decision, and being allowed only the power of choice among the things robots allow. The more we depend on robots, the more limited those choices become. We don't want our children to limit themselves to wanting what robots can provide! We don't want them shriveling to where they abandon everything robots can't give—or won't! We want them to be men—and women. Not damned automatons who livebypushing robot-controls so they can livetopush robot-controls. If that's not subordination to robots—"
"It's an emotional argument," protested Roane. "Not everybody feels that way."
"But I feel that way," said Huyghens. "And so do a lot of others. This is a big galaxy and it's apt to contain some surprises. The one sure thing about a robot and a man who depends on them is that they can't handle the unexpected. There's going to come a time when we need men who can. So on my home planet, some of us asked for Loren Two, to colonize. It was refused—too dangerous. But men can colonize anywhere if they're men. So I came here to study the planet. Especially the sphexes. Eventually, we expected to ask for a license again, with proof that we could handle even those beasts. I'm already doing it in a mild way. But the Survey licensed a robot colony—and where is it?"
Roane made a sour face.
"You picked the wrong way to go about it, Huyghens. It was illegal. It is. It was the pioneer spirit, which is admirable enough, but wrongly directed. After all, it was pioneers who left Earth for the stars. But—"
Sourdough raised up on his hind legs and sniffed the air. Huyghens swung his rifle around to be handy. Roane slipped off the safety-catch of his own. Nothing happened.
"In a way," said Roane vexedly, "you're talking about liberty and freedom, which most people think is politics. You say it can be more. In principle, I'll concede it. But the way you put it, it sounds like a freak religion."
"It's self-respect," corrected Huyghens.
"You may be—"
Faro Nell growled. She bumped Nugget with her nose, to drive him closer to Roane. She snorted at him. She trotted swiftly to where Sitka and Sourdough faced toward the broader, sphex-filled expanse of the Sere Plateau. She took up her position between them.
Huyghens gazed sharply beyond them and then all about.
"This could be bad!" he said softly. "But luckily there's no wind. Here's a sort of hill. Come along, Roane!"
He ran ahead, Roane following and Nugget plumping heavily with him. They reached the raised place—actually a mere hillock no more than five or six feet above the surrounding sand, with a distorted cactuslike growth protruding from the ground. Huyghens stared again. He used his binoculars.
"One sphex," he said curtly. "Just one! And it's out of all reason for a sphex to be alone! But it's not rational for them to gather in hundreds of thousands, either!" He wetted his finger and held it up. "No wind at all."
He used the binoculars again.
"It doesn't know we're here," he added. "It's moving away. Not another one in sight—" He hesitated, biting his lips. "Look here, Roane! I'd like to kill that one lone sphex and find out something. There's a fifty per cent chance I could find out something really important. But—I might have to run. If I'm right—" Then he said grimly, "It'll have to be done quickly. I'm going to ride Faro Nell—for speed. I doubt Sitka or Sourdough would stay behind. But Nugget can't run fast enough. Will you stay here with him?"
Roane drew in his breath. Then he said calmly:
"You know what you're doing. Of course."
"Keep your eyes open. If you see anything, even at a distance, shoot and we'll be back—fast! Don't wait until something's close enough to hit. Shoot the instant you see anything—if you do!"
Roane nodded. He found it peculiarly difficult to speak again. Huyghens went over to the embattled bears. He climbed up on Faro Nell's back, holding fast by her shaggy fur.
"Let's go!" he snapped. "That way! Hup!"
The three Kodiaks plunged away at a dead run, Huyghens lurching and swaying on Faro Nell's back. The sudden rush dislodged Semper from his perch. He flapped wildly and got aloft. Then he followed effortfully, flying low.
It happened very quickly. A Kodiak bear can travel as fast as a race horse on occasion. These three plunged arrow-straight for a spot perhaps half a mile distant, where a blue-and-tawny shape whirled to face them. There was the crash of Huyghens' weapon from where he rode on Faro Nell's back—the explosion of the weapon and the bullet was one sound. The somehow unnatural spiky monster leaped and died.
Huyghens jumped down from Faro Nell. He became feverishly busy at something on the ground—where the parti-colored sphex had fallen. Semper banked and whirled and came down to the ground. He watched, with his head on one side.
Roane stared, from a distance. Huyghens was doing something to the dead sphex. The two male bears prowled about. Faro Nell regarded Huyghens with intense curiosity. Back at the hillock, Nugget whimpered a little. Roane patted him roughly. Nugget whimpered more loudly. In the distance, Huyghens straightened up and took three steps toward Faro Nell. He mounted. Sitka turned his head back toward Roane. He seemed to see or sniff something dubious. He reared upward. He made a noise, apparently, because Sourdough ambled to his side. The two great beasts began to trot back. Semper flapped wildly and—lacking wind—lurched crazily in the air. He landed on Huyghens' shoulder and his talons clung there.
Then Nugget howled hysterically and tried to swarm up Roane, as a cub tries to swarm up the nearest tree in time of danger. Roane collapsed, and the cub upon him—and there was a flash of stinking scaly hide, while the air was filled with the snarling, spitting squeals of a sphex in full leap. The beast had over-jumped, aiming at Roane and the cub while both were upright and arriving when they had fallen. It went tumbling.
Roane heard nothing but the fiendish squalling, but in the distance Sitka and Sourdough were coming at rocketship speed. Faro Nell let out a roar and fairly split the air. And then there was a furry cub streaking toward her, bawling, while Roane rolled to his feet and snatched up his gun. He raged through pure instinct. The sphex crouched to pursue the cub and Roane swung his weapon as a club. He was literally too close to shoot—and perhaps the sphex had only seen the fleeing bear-cub. But he swung furiously.
And the sphex whirled. Roane was toppled from his feet. An eight-hundred-pound monstrosity straight out of hell—half wildcat and half spitting cobra with hydrophobia and homicidal mania added—such a monstrosity is not to be withstood when in whirling its body strikes one in the chest.