"Or take it that this world was an unlucky reef on which too many ships and cargoes were lost, so that our whole solar system was posted, and skippers of star ships thereafter avoided it? Or they might even have had some rule that when a planet developed a primitive race of its own, it was to be left strictly alone until it discovered s.p.a.ce flight for itself."

"Yes." Every one of Ashe's suppositions made good sense, and Ross was able to believe them. It was easier to think that both Furry-face and Baldy were inhabitants of another world than to think their kind existed on this planet before his own species was born. "But how did the Russians locate that ship?"

"Unless the information is on the tapes we were able to bring along, we shall probably never know," Ashe said drowsily. "I might make one guess-the Russians have been making an all-out effort for three hundred years to open up Siberia. In some sections of that huge country there have been great climatic changes almost overnight in the far past. Mammoths have been discovered frozen in the ice with half-digested plants in their stomach. It's as if the beasts were given some deep-freeze treatment instantaneously. If in their excavations the Russians came across the remains of a s.p.a.ceship, remains well enough preserved for them to realize what they had discovered, they might start questing back in time to find a better one intact at an earlier date. That theory fits everything we know now."

"But why would the aliens attack the Russians now?"

"No ship's officers ever thought gently of pirates." Ashe's eyes closed.

There were questions, a flood of them, that Ross wanted to ask. He smoothed the fabric on his arm, that stuff which clung so tightly to his skin yet kept him warm without any need for more covering. If Ashe were right, on what world, what kind of world, had that material been woven, and how far had it been brought that he could wear it now?

Suddenly McNeil slid into their shelter and dropped two hares at the edge of the fire.

"How goes it?" he said, as Ross began to clean them.

"Reasonably well," Ashe, his eyes still closed, replied to that before Ross could. "How far are we from the river? And do we have company?"

"About five miles-if we had wings." McNeil answered in a dry tone. "And we have company all right, lots of it!"

That brought Ashe up, leaning forward on his good elbow. "What kind?"

"Not from the village." McNeil frowned at the fire which he fed with economic handfuls of sticks. "Something's happening on the side of the mountains. It looks as if there's a ma.s.s migration in progress. I counted five family clans on their way west-all in just this one morning."

"The village refugees' stories about devils might send them packing," Ashe mused.

"Maybe." But McNeil did not sound convinced. "The sooner we head downstream, the better. And I hope the boys will have that sub waiting where they promised. We do possess one thing in our favor-the spring floods are subsiding."

"And the high water should have left plenty of raft material." Ashe lay back again. "We'll make those five miles tomorrow."

McNeil stirred uneasily and Ross, having cleaned and spitted the hares, swung them over the flames to broil. "Five miles in this country," the younger man observed, "is a pretty good day's march"-he did not add as he wanted to-"for a well man."

"I will make it," Ashe promised, and both listeners knew that as long as his body would obey him he meant to keep that promise. They also knew the futility of argument.

Ashe proved to be a prophet to be honored on two counts. They did make the trek to the river the next day, and there was a wealth of raft material marking the high-water level of the spring flood. The migrations NcNeil had reported were still in progress, and the three men hid twice to watch the pa.s.sing of small family clans. Once a respectably sized tribe, including wounded men, marched across their route, seeking a ford at the river.

"They've been badly mauled," McNeil whispered as they watched the people huddle along the water's edge while scouts cast upstream and down, searching for a ford. When they returned with the news that there was no ford to be found, the tribesmen then sullenly went to work with flint axes and knives to make rafts.

"Pressure-they are on the run." Ashe rested his chin on his good forearm and studied the busy scene. "These are not from the village. Notice the dress and the red paint on their faces. They're not like Ulffa's kin either. I wouldn't say they were local at all."

"Reminds me of something I saw once-animals running before a forest fire. They can't all be looking for new hunting territory," McNeil returned.

"Russians sweeping them out," Ross suggested. "Or could the ship people-?"

Ashe started to shake his head and then winced. "I wonder . . ." The crease between his level brows deepened. "The ax people!" His voice was still a whisper, but it carried a note of triumph as if he had fitted some stubborn jigsaw piece into its proper place.

"Ax people?"

"Invasion of another people from the east. They turned up in prehistory about this period. Remember, Webb spoke of them. They used axes for weapons and tamed horses."

"Tartars"-McNeil was puzzled- "This far west?"

"Not Tartars, no. You needn't expect those to come boiling out of middle Asia for some thousands of years yet. We don't know too much about the ax people, save that they moved west from the interior plains. Eventually they crossed to Britain; perhaps they were the ancestors of the Celts who loved horses too. But in their time they were a tidal wave."

"The sooner we head downstream, the better." McNeil stirred restlessly, but they knew that they must keep to cover until the tribesmen below were gone. So they lay in hiding another night, witnessing on the next morning the arrival of a smaller party of the red-painted men, again with wounded among them. At the coming of this rear guard the activity on the river bank rose close to frenzy.

The three men out of time were doubly uneasy. It was not enough for them to merely cross the river. They had to build a raft which would be water-worthy enough to take them downstream-to the sea if they were lucky. And to build such a st.u.r.dy raft would take time, time they did not have now.

In fact, McNeil waited only until the last tribal raft was out of bow shot before he plunged down to the sh.o.r.e, Ross at his heels. Since they lacked even the stone tools of the tribesmen, they were at a disadvantage, and Ross found he was hands and feet for Ashe, working under the other's close direction. Before night closed in they had a good beginning and two sets of blistered hands, as well as aching backs.

When it was too dark to work any longer, Ashe pointed back over the track they had followed. Marking the mountain pa.s.s was a light. It looked like fire, and if it was, it must be a big one for them to be able to sight it across this distance.

"Camp?" McNeil wondered.

"Must be," Ashe agreed. "Those who built that blaze are in such numbers that they don't have to take precautions."

"Will they be here by tomorrow?"

"Their scouts might, but this is early spring, and forage can't have been too good on the march. If I were the chief of that tribe, I'd turn aside into the meadow land we skirted yesterday and let the herds graze for a day, maybe more. On the other hand, if they need water-"

"They will come straight ahead!" McNeil finished grimly. "And we can't be here when they arrive."

Ross stretched, grimacing at the twinge of pain in his shoulders. His hands smarted and throbbed, and this was just the beginning of their task. If Ashe had been fit, they might have trusted to logs for support and swum downstream to hunt a safer place for their shipbuilding project. But he knew that Ashe could not stand such an effort.

Ross slept that night mainly because his body was too exhausted to let him lie awake and worry. Roused in the earliest dawn by McNeil, they both crawled down to the water's edge and struggled to bind stubbornly resisting saplings together with cords twisted from bark. They reinforced them at crucial points with some strings torn from their kilts, and strips of rabbit hide saved from their kills of the past few days. They worked with hunger gnawing at them, having no time now to hunt. When the sun was well westward they had a clumsy craft which floated sluggishly. Whether it would answer to either pole or improvised paddle, they could not know until they tried it.

Ashe, his face flushed and his skin hot to the touch, crawled on board and lay in the middle, on the thin heap of bedding they had put there for him. He eagerly drank the water they carried to him in cupped hands and gave a little sigh of relief as Ross wiped his face with wet gra.s.s, muttering something about Kelgarries which neither of his companions understood.

McNeil shoved off and the bobbing craft spun around dizzily as the current pulled it free from the sh.o.r.e. They made a brave start, but luck deserted them before they had gotten out of sight of the spot where they embarked.

Striving to keep them in mid-current, McNeil poled furiously, but there were too many rocks and snagged trees with them, and coming up fast was a full-sized tree. Twice its mat of branches caught on some snag, holding it back, and Ross breathed a little more freely, but it soon tore free again and rolled on, as menacing as a battering ram.

"Get closer to sh.o.r.e!" Ross shouted the warning. Those great, twisted roots seemed aimed straight at the raft, and he was sure if that ma.s.s struck them fairly, they would not have a chance. He dug in with his own pole, but his hasty push did not meet bottom; the stake in his hands plunged into some pothole in the hidden river bed. He heard McNeil cry out as he toppled into the water, gasping as the murky liquid flooded his mouth, choking him.

Half dazed by the shock, Ross struck out instinctively. The training at the base had included swimming, but to fight water in a pool under controlled conditions was far different from fighting death in a river of icy water when one had already swallowed a sizable quant.i.ty of that flood.

Ross had a half glimpse of a dark shadow. Was it the edge of the raft? He caught at it desperately, skinning his hands on rough bark, dragged on by it. The tree! He blinked his eyes to clear them of water, to try to see. But he could not pull his exhausted body high enough out of the water to see past the screen of roots; he could only cling to the small safety he had won and hope that he could rejoin the raft somewhere downstream.

After what seemed like a very long time he wedged one arm between two water-washed roots, sure that the support would hold his head above the surface. The chill of the stream struck at his hands and head, but the protection of the alien clothing was still effective, and the rest of his body was not cold. He was simply too tired to wrest himself free and trust again to the haphazard chance of making sh.o.r.e through the gathering dusk.

Suddenly a shock jarred his body and strained the arm he had thrust among the roots, wringing a cry out of him. He swung around and brushed footing under the water; the tree had caught on a sh.o.r.e snag. Pulling loose from the roots, he floundered on his hands and knees, falling afoul of a ma.s.s of reeds whose roots were covered with stale-smelling mud. Like a wounded animal he dragged himself through the ooze to higher land, coming out upon an open meadow flooded with moonlight.

For a while he lay there, his cold, sore hands under him, plastered with mud and too tired to move. The sound of a sharp barking aroused him-an imperative, summoning bark, neither belonging to a wolf nor a hunting fox. He listened to it dully and then, through the ground upon which he lay, Ross felt as well as heard the pounding of hoofs.

Hoofs-horses! Horses from over the hills-horses which might mean danger. His mind seemed as dull and numb as his hands, and it took quite a long time for him to fully realize the menace horses might bring.

Getting up, Ross noticed a winged shape sweeping across the disk of the moon like a silent dart. There was a single despairing squeak out of the gra.s.s about a hundred feet away, and the winged shape arose again with its prey. Then the barking sound once more-eager, excited barking.

Ross crouched back on his heels and saw a smoky brand of light moving along the edge of the meadow where the band of trees began. Could it be a herd guard? Ross knew he had to head back toward the river, but he had to force himself on the path, for he did not know whether he dared enter the stream again. But what would happen if they hunted him with the dog? Confused memories of how water spoiled scent spurred him on.

Having reached the rising bank he had climbed so laboriously before, Ross miscalculated and tumbled back, rolling down into the mud of the reed bed. Mechanically he wiped the slime from his face. The tree was still anch.o.r.ed there; by some freak the current had rammed its rooted end up on a sand spit.

Above in the meadow the barking sounded very close and now it was answered by a second canine belling. Ross wormed his way back through the reeds to the patch of water between the tree and the bank. His few poor efforts at escape were almost half-consciously taken; he was too tired to really care now.

Soon he saw a four-footed shape running along the top of the bank, giving tongue. It was then joined by a larger and even more vocal companion. The dogs drew even with Ross, who wondered dully if the animals could sight him in the shadows below, or whether they only scented his presence. He had been able, he would have climbed over the log and taken his chances in the open water, but now he could only lie where he was-the tangle of roots between him and the bank serving as a screen, which would be little enough protection when men came with torches.

Ross was mistaken, however, for his worm's progress across the reed bed had liberally besmeared his dark clothing and masked the skin of his face and hands, giving him better cover than any he could have wittingly devised. Though he felt naked and defenseless, the men who trailed the hounds to the river bank, thrusting out the torch over the edge to light the sand spit, saw nothing but the trunk of the tree wedged against a mound of mud.

Rose heard a confused murmur of voices broken by the clamor of the dogs. Then the torch was raised out of line of his dazzled eyes. He saw one of the indistinct figures above cuff away a dog and move off, calling the hounds after it. Reluctantly, still barking, the animals went. Ross, with a little sob, subsided limply in the uncomfortable net of roots, still undiscovered.

15.

It was such a small thing, a tag of ragged stuff looped about a length of splintered sapling. Ross climbed stiffly over the welter of drift caught on the sand spit and pulled it loose, recognizing the string even before he touched it. That square knot was of McNeil's tying. As Murdock sat down weakly in the sand and mud, nervously fingering the twisted cord, he stared vacantly at the river. His last small hope died. The raft must have broken up, and neither Ashe nor McNeil could have survived the ultimate disaster.

Ross Murdock was alone, marooned in a time which was not his own, with little promise of escape. That one thought blanked out his mind with its own darkness. What was the use of getting up again, or trying to find food for his empty stomach, or warmth and shelter?

He had always prided himself on being able to go it alone, had thought himself secure in that calculated loneliness. Now that belief had been washed away in the river along with most of the will power which had kept him going these past days. Before, there had always been some goal, no matter how remote. Now, he had nothing. Even if he managed to reach the mouth of the river, he had no idea of where or how to summon the sub from the overseas post. All three of the time travelers might already have been written off the rolls, since they had not reported in.

Ross pulled the rag free from the sapling and wreathed it in a tight bracelet about his grimed wrist for some unexplainable reason. Worn and tired, he tried to think ahead. There was no chance of contacting Ulffa's tribe again. Along with all the other woodland hunters they must have fled before the advance of the hors.e.m.e.n. No, there was no reason to go back, and why make the effort to advance?

The sun was hot. This was one of those spring days which foretell the ripeness of summer. Insects buzzed in the reed banks where a green sheen showed. Birds wheeled and circled in the sky. Some flock was disturbed, their cries reaching Ross in hoa.r.s.e calls of warning.

He was still plastered with patches of dried mud and slime, the reek of it thick in his nostrils. Now Ross brushed at a splotch on his knee, picking loose flakes to expose the alien cloth of his suit underneath, seemingly unbefouled. All at once it became necessary to be clean again at least.

Ross waded into the stream, stooping to splash the brown water over his body and then rubbing away the resulting mud. In the sunlight the fabric had a brilliant glow, as if it not only drew the light but reflected it. Wading farther out into the water, he began to swim, not with any goal in view, but because it was easier than crawling back to land once more.

Using the downstream current to supplement his skill, he watched both banks. He could not really hope to see either the raft or indications that its pa.s.sengers had won to sh.o.r.e, but somewhere deep inside him he had not yet accepted defeat.

The effort of swimming broke through that fog of inertia which had held him since he had awakened that morning. With a somewhat healthier interest in life Ross came ash.o.r.e again on an arm of a bay or inlet angling back into the land. Here the banks of the river were well above his head, and believing that he was well sheltered, he stripped, hanging his suit in the sunlight and letting the unusual heat of the day soothe his body.

A raw fish, cornered in the shallows and scooped out, furnished one of the best meals he had ever tasted. He had reached for the suit draped over a willow limb when the first and only warning that his fortunes had once again changed came, swiftly, silently, and with deadly promise.

One moment the willows had moved gently in the breeze, and then a spear suddenly set them all quivering. Ross clutching the suit to him with a frantic grab, skidded about in the sand, going to one knee in his haste.

He found himself completely at the mercy of the two men standing on the bank well above him. Unlike Ulffa's people or the Beaker traders, they were very tall, with heavy braids of light, sun-bleached hair swinging forward on their wide chests. Their leather tunics hung to mid-thigh above leggings which were bound to their limbs with painted straps. Cuff bracelets of copper ringed their forearms, and necklaces of animal teeth and beads displayed their personal wealth. Ross could not remember having seen their like on any of the briefing tapes at the base.

One spear had been a warning, but a second was held ready, so Ross made the age-old signal of surrender, reluctantly dropping his suit and raising his hands palm out and shoulder high.

"Friend?" Ross asked in the Beaker tongue. The traders ranged far, and perhaps there was a chance they had had contact with this tribe.

The spear twirled and the younger stranger effortlessly leaped down the bank. He paddled over to Ross to pick up the suit he had dropped and held it up while he made some comment to his companion. He seemed fascinated by the fabric, pulling and smoothing it between his hands. Ross wondered if there was a chance of trading it for his own freedom.

Both men were armed, not only with the long-bladed daggers favored by the Beaker folk, but also with axes. When Ross made a slight effort to lower his hands the man before him reached to his belt ax, growling what was plainly a warning. Ross blinked, realizing that they might well knock him out and leave him behind, taking the suit with them.

Finally, they decided in favor of including him in their loot. Throwing the suit over one arm, the stranger caught Ross by the shoulder and pushed him forward roughly. The pebbled beach was painful to Ross's feet, and the breeze which whipped about him as he reached the top of the bank reminded him only too forcibly of his ordeal in the glacial world.

Murdock was tempted to dash out on the point of the bank and dive into the river, but it was already too late. The man who was holding the spear had moved behind him, and Ross's wrist, held in a vise grip at the small of his back, kept him prisoner as he was pushed on into the meadow. There three s.h.a.ggy horses grazed, their nose ropes gathered into the hands of a third man.

A sharp stone half buried in the ground changed the pattern of the day. Ross's heel sc.r.a.ped against it, and the resulting pain triggered his rebellion into explosion. He threw himself backward, his bruised heel sliding between the feet of his captor, bringing them both to the ground with himself on top. The other expelled air from his lungs in a grunt of surprise, and Ross whipped over, one hand grasping the hilt of the tribesman's dagger while the other, free of that prisoning wristlock, chopped at the fellow's throat.

Dagger out and ready, Ross faced the men in a half crouch as he had been drilled. They stared at him in open-mouthed amazement, then too late the spears went up. Ross placed the point of his looted weapon at the throat of the now quiet man by whom he knelt, and he spoke the language he had learned from Ulffa's people.

"You strike-this one dies."

They must have read the determined purpose in his eyes, for slowly, reluctantly, the spears went down. Having gained so much of a victory, Ross dared more. "Take-" he motioned to the waiting horses- "take and go!"

For a moment he thought that this time they would meet his challenge, but he continued to hold the dagger above the brown throat of the man who was now moaning faintly. His threat continued to register, for the other man shrugged the suit from his arm, left it lying on the ground, and retreated. Holding the nose rope of his horse, he mounted, waved the herder up also, and both of them rode slowly away.

The prisoner was slowly coming around, so Ross only had time to pull on the suit; he had not even fastened the breast studs before those blue eyes opened. A sunburned hand flashed to a belt, but the dagger and ax which had once hung there were now in Ross's possession. He watched the tribesman carefully as he finished dressing.

"What you do?" The words were in the speech of the forest people, distorted by a new accent.

"You go-" Ross pointed to the third horse the others had left behind- "I go-" he indicated the river-"I take these"-he patted the dagger and the ax. The other scowled.

"Not good . . ."

Ross laughed, a little hysterically. "Not good you," he agreed, "good-me!"

To his surprise the tribesman's stiff face relaxed, and the fellow barked a laugh. He sat up, rubbing at his throat, a big grin pulling at the corners of his mouth.

"You hunter?" The man pointed northeast to the woodlands fringing the hills.

Ross shook his head. "Trader, me."

"Trader," the other repeated. Then he tapped one of the wide metal cuffs at his wrist. "Trade-this?"

"That. More things."

"Where?"

Ross pointed downstream. "By bitter water-trade there."

The man appeared puzzled. "Why you here?"

"Ride river water, like you ride," he said, pointing to the horse. "Ride on trees-many trees tied together. Trees break apart-I come here."

The conception of a raft voyage apparently got across, for the tribesman was nodding. Getting to his feet, he walked across to take up the nose rope of the waiting horse. "You come camp-Foscar. Foscar chief. He like you show trick how you take Tulka, make him sleep-hold his ax, knife."

Ross hesitated. This Tulka seemed friendly now, but would that friendliness last? He shook his head. "I go to bitter water. My chief there."

Tulka was scowling again. "You speak crooked words-your chief there!" He pointed eastward with a dramatic stretch of the arm. "You chief speak Foscar. Say he give much these-" he touched his copper cuffs-"good knives, axes-get you back."

Ross stared at him without understanding. Ashe? Ashe in this Foscar's camp offering a reward for him? But how could that be?