Obstacles that normally he would not have noticed made his path tortuous. His great weight sank his feet ankle-high in the moist, uneven ground. Time and time again he stumbled over some imbedded rock that, potato-sized, was like a boulder to him. Time and time again he fell, and when he rose his legs were plastered with soggy earth that did not dry; and the damp, fallen leaves and twigs he pitched into clung to his coating of mud. Each broken limb and branch, dropped from the whispering gloom of the trees above, drained the energy from his tiring muscles. Soon he was conscious of a vague numbness creeping over him, a deceptive, drowsy warmth into which he longed to sink, but which he drove back by working his arms and legs as vigorously as he could.

On he went, with teeth clenched and eyes fixed on the half-seen trail ahead--a fantastic, tiny creature hunted like a wild animal by a giant of his own kind!

Presently, through the shroud of darkness traced by ghostly slivers of starlight, came the sound of trickling water. The trail rose, dipped down; and through that hollow crawled the stream, winding from a hidden spring to the encompa.s.sing river below. Garth was winded when he came to it; to his eyes it seemed a small river. His legs were so numb they hardly felt the cold bite of the water that lapped around them.

Some furry water animal leaped away as Garth trudged upstream, alarmed by the strange midnight visitant and the self-encouraging mutterings of a shrill human voice....

He had waded what seemed to him a weary distance--in reality only a few hundred yards--through the winding, icy creek, when suddenly he halted and stood stock-still. Listening, he heard the ordinary sounds of the wind through the fir-spires, and the slow trickle of water; heard the beating of his own heart. Nothing else. And yet.... He took another step.

Then he swung quickly around and peered back, senses alert. There was no mistaking the sound that had come again. It was the crunch of heavy feet, thudding at even intervals on damp earth. They were Hagendorff's; and he was armed with light!

A long beam of white speared through the tangle of bush and tree trunks far below. It came slanting down from above, prying for the story recorded by miniature footprints in the ground. By its distance from him, Garth could tell Hagendorff had come to where his trail led into the stream. The ray held steady for minutes. Again it prowled nervously around, hunting for tell-tale signs, sweeping in widening circles. Then, it was punctuated by the crunch of a boot.

The giant was following upstream!

With the flashlight, he might even be able to trace the prints in the bed of the creek. Stooping, Garth crept ahead, as silently as he could, though the stir of water at his feet seemed terribly loud.

There were keen ears behind, craned for sounds like that. He knew he would have to hide again--quickly--and at that moment he saw a place.

A cleft in the bank to his right held a small hole, dimly limned by a wisp of starlight. On hands and feet the midget scrambled cat-like to it. It slanted down and inwards, only inches wide, so that the earth was close to his body when he slid feet-first inside. But it was warm and dry, for it was shielded by a ledge from rain, and with the warmth the hunted manikin's spirits rose somewhat. The ray of light, which he could see sweeping back and forth downstream, was still following slowly, as if Hagendorff were having trouble making out the water-covered trail. Garth breathed easier, cuddled down--and then, for some unaccountable reason, he felt uneasy.

He had not noticed it at first, but now his nostrils were filled with a queer, musky odor that electrified his nerves and tensed his muscles. He felt the short hairs on his neck rise; felt his lips tighten and draw back over clenched teeth. Some long-buried instinct was warning him of danger--and suddenly he sprang from the hole and swung around.

From it, a killer came snaking out, its bared fangs thirsty for his life blood!

Arching and swaying its lithe-muscled body, it slid forward in its graceful, savage way--a weasel, the deadliest pound-for-pound killer that prowls the forest. It was as long as the naked human who faced it was tall. Unwittingly, he had chosen its hole as a refuge.

Retreat would have been impossible, but Garth for some reason did not even think of it. A strange new sensation poured through his tense body, a sensation akin to fierce joy. Gone was his tiredness; his teeth too were bared, matching the wicked fangs before him. Two primal creatures they were, tooth to tooth and claw to claw, the man as naked and intoxicated with the blood l.u.s.t as the ten pounds of bone and sinew that now darted suddenly for his throat.

With the lightning quickness that had come to him with small size, Garth stepped aside. And as the weasel's head streaked by he called on man's distinctive weapon, and put every ounce of his weight behind a right arm swing that landed square on a cold black nose and doubled the weasel back in midair.

Stunned, it writhed for a second on the slippery bank; and then again it was up, mad with pain now and swaying slightly as it gathered for a second leap against this creature that fought so strangely.

But in the momentary respite Garth had reasoned out his best chance.

He did not try to fight off the second dart with his fists, but went boldly in. Ducking through the needle claws with head lowered, his tiny hands streaked in on the furry throat. He found it, and his fingers thumbed into the wind-pipe; but not before the weasel smelled the blood its claws had drawn and went utterly berserk. For a moment there was a wild flurry of furry, tearing legs and a blood-streaked white body between them, trying desperately to evade their slicing strokes. They pitched down the bank together, animal and man struggling silently to the death; and when they jarred to a stop in the water below, Garth's strategy was achieved.

He was uppermost; his grip was steel around the throbbing throat, and the hundred and eighty pound weight of his body was holding the legs powerless. Not an inch from his face the weasel's fangs clashed frantically together. Garth maintained his clutch, squeezing with every bit of his mighty strength. The animal shuddered; then writhed in the death convulsions; at last lay still.

Panting, his mind a welter of primate emotions roused by the kill, the man shook it a last time, jumped to his feet and glared around--to see the beam of a flashlight only a dozen yards away. His more deadly foe, the human foe, was upon him. Perhaps the sounds of the fight had reached his ears.

Garth lost not a moment. Quickly he slung the weasel's body back into the hole and jammed himself down after it.

Hagendorff approached slowly, mumbling and cursing to himself in sullen ill-humor. Things were not going as he had expected them to.

The white ray scoured the banks of the stream, searching doggedly.

Nearer he came, and with each step the watching midget's rapid breathing grew tighter. The towering body was more than shadow now.

Another ten feet and the flashlight would find the marks of the fight.

But the t.i.tan's patience gave out. Closer than he had yet been to his quarry, he paused, and again the thunder of his voice broke the night's hush.

"Bah! This is foolish! In daylight I find him certainly. I have waited long; I can wait a little more. I need sleep. To-morrow, it will be different!"

He swung away from the stream, and in a few minutes the rip and crash of his progress through the bush had died. In the silence, Garth Howard considered his situation.

He faced it squarely, as was his custom. He did not brood over the treachery of his a.s.sistant, or of how unfairly and suddenly it had plunged him into peril and robbed him of his normal body. He accepted his position and searched for possible angles of escape. There were not many hours left in which to make a decisive move. The island was small, and, as Hagendorff had said, discovery would be inevitable in daytime.

Garth thought of the machine, and of the giant sleeping. A desperate plan came to him, and his jaws set decisively. "I'll do it!" he exclaimed aloud.

The lever which controlled both increase and decrease could be worked from inside the chamber if he rigged up a system of turning it with a wire or rope. If he pulled it to the increase only part way, he would, he knew, have sufficient power over his muscles to pull it back off, or slide again from the chamber, as he had done before. Whether or not he could do this depended on Hagendorff's being asleep. Possibly he could be locked in the living room, if he were there. Or tied. The increase, even at half speed, would only take about forty seconds.

Once back to his size there would be a fight without odds, Garth thought grimly.

It was a big risk, and there was probably only a small chance of succeeding, but it meant getting back to six feet, back to a normal world, back to equal terms. That was the magnet which drew him presently toward the cabin laboratory.

He went slowly, to allow Hagendorff plenty of time to fall soundly asleep. The giant, as he had said, needed sleep--needed it badly--for, like Garth Howard, he had done without it for forty-eight hours under the excitement of imminent success in their work. Garth considered that his move would be totally unexpected, being made right into the other's territory. There was a chance.

And so, cold and weariness banished by thoughts of the goal ahead, he prowled back along the trail like any small creature of the forest.

It was half an hour later when he came in sight of the cabin. His heart drummed excitedly as he stood in the shadows surveying it. He wondered if Hagendorff was still awake; if he was, perhaps, waiting for him. Certainly he did not seem to be: the cabin was dark and silent, and the only door was tightly closed. Still--it might be wiser to retreat while still free....

"No, by heaven!" Garth Howard exclaimed in his thoughts. "I'm going through with it!" Stooping slightly, he left the shadows and ran boldly into the starlight.

He half expected to hear a scuffle of feet and see the giant come leaping out at him; but nothing broke the silence. He made his careful way along the side of the cabin to the place where a trough for waste liquids led through a small hole at the level of the floor, and with great care wormed through.

As he started to cautiously reconnoiter, he was suddenly arrested in his tracks. He had caught the sound of deep, rhythmic breathing.

Hagendorff was asleep, not in the adjoining living room--but in the laboratory!

For a moment, Garth did not know what to do. Caution urged him to retreat; but that would not get him back to his size. On tip-toe, he explored around. The boards squeaked beneath his great weight, but the nearby breathing beyond continued in regular rhythm.

His eyes were toned to the darkness of the laboratory; he saw the chamber of his atom-compacting machine, its outer sides ghostly in the faint, reflected starlight, and stared at it with a pang of fierce longing. So near, it was--so very near! Holding the stolen size of his body; holding all that was vital to him; holding life itself--it rested there silently, within reach of a few steps and a quick climb up one of the table legs. So he thought, his brain whirling with mingled emotions, his tiny body shivering and aching with cold and its many hurts. The machine was near--but a barrier blocked the way.

Hagendorff's bulk lay outstretched on a side table, black in the shadows, and from him came the level breathing of a sound sleeper, climaxed now and again by a rumbling snore. He was taking no chances; his presence there seemed to destroy any hope of the midget's regaining normal size. But Garth was desperate, and for a minute or so he considered.

Forty seconds, the increase would take, at half speed. It might be that long before the giant would waken thoroughly and see what was happening. He, Garth, might start the process, and, when he saw the huge figure stirring and waking from the noise of the dynamo, switch off the ray and get out. No matter how short a time it took Hagendorff to throw off the fogginess of his sleep, he would be somewhat increased in size, and the odds of combat would not be so great.