The joyous inebriation was wearing off. Winslow met his companion's eyes sheepishly as they stopped where a sheer cliff of basalt above caught and held the warmth of the sun's rays. Behind them it rose a straight hundred feet, and before stretched a vast panorama. The sun was mounting now in the sky. It brought into strong relief the welter of volcanic waste that extended in bold detail through the clear air far out to the horizon, where, misty and dim, the first vaporous clouds were forming from the steaming earth.

And as they watched, the depressing bareness and emptiness of that gray-black expanse was changing. Far to the east a pink flush was spreading on the hills. It wavered and flowed, and it changed, as they watched, to deep areas of orange and red. The delicate pink swept in waves over valleys and hills, a vast kaleidoscopic coloration that rioted over a strange world.

In silence it spilled into the valley below. The slope they had traversed was radiant with color.

At their feet the ground was in motion: it heaved and rolled in countless places. Rounded shapes in myriads were emerging.

Plants--mushroom growths--poured up from the earth to drink in the sunshine of their brief summer. They burst the earth to show unfolding leaves or blunted, rounding heads, that grew before the men's incredulous eyes.

Winslow was the first to recover from the stupefying beauty of the spectacle.

"The machine!" he gasped. "Back to the ship! We'll be swamped, overwhelmed...." He rushed madly back down the slope.

Jerry was beside him, a revulsion of feeling driving him to frantic efforts. The piercing beauty that had enthralled him has become a thing of terror. The soft, pulpy, growing things that crushed beneath his feet were a menace in their l.u.s.t for life.

They were a mile and more from the machine. Could they ever find it, Jerry wondered. The whole landscape was changed; bare rocks were half-hidden now under clinging, creeping vines. Only the sun remained as a guide. They must go toward the sun and a little north.

He followed Winslow, who was circling a huge area of weird growths that already were waist high. They leaped across a gaping chasm and fought their way over a low hill, rank with vegetation, only to be confronted by a maze of great stalks--stalks that sprouted as they watched, dismayed, and threw out grotesque and awkward branches.

They made one futile effort to force their way, but the trunks, though pliant, were unyielding. To attempt to find their way through the labyrinth was folly.

"We've got to keep on trying," said Jerry Foster. "We've got to get back, or...."

Winslow, as the look in his eyes showed, needed no ending to that sentence. There was the summer of a lunar day ahead; the inventor did not need to be told of the scorching, broiling heat that would wither the land when the sun struck from straight overhead. And in their ship was food and water and a means of transport to the cooler heights above.

It was Jerry who took charge of the situation. Here was a prodigious laboratory in which Winslow's science was useless, but in fighting with nature--even nature in as weird and terrifying a mood as this--Jerry felt himself not entirely incompetent.

He looked about him. It had been but an hour since they watched the first onslaught of this life that engulfed them. And now they were cut off. Through an opening, where bare rocks made a rift in the vegetation, he saw again the high ground where they had stood. There was more rock there on the volcanic slope: the growing things were in clumps--islands, rather than continents of rank growth.

"We must go back," he told Winslow, "and climb while we can. Get to the high ground, take bearings on the place where we left the ship.

We'll look over the ground and figure some way to get there."

Winslow nodded. He was plainly bewildered, lost in the new jungle. He followed Jerry, who bounded across a crevice in the earth. The ground was rotten with the honeycomb of caves and cracks.

Jerry forced his way through and over a rock heap, where the thick trunks of nightmare trees were s.p.a.ced farther apart. There was an opening ahead; he started forward, then stopped abruptly and motioned the other to silence.

From beyond there came sounds. There was rending of soft, pliant tissue. The sound came through the thin air from a grove up ahead, where big plants were waving, though the wind had long since ceased.

To their ears came a snoring, blubbering snuffle. A stone was dislodged, to come bounding toward them from the hillside; the soft plants were flattened before it. The men cowered in the shelter of a giant fungus.

Beyond the rocks, above the mottled reds and yellows of the grotesque trees, a head appeared. It waved at the end of a long, leathery neck.

All mouth, it seemed to the watchers, as they saw a pair of short forelegs pull the succulent tops of the giant growth into a capacious maw. Below, there was visible a part of a gigantic, grayish body. It was crashing down toward them, eating greedily as it came.

"Back," said Jerry softly. "Go back to that cave. We will hide there in some crack in the ground."

They picked their way noiselessly over the rocks. The cave they had crossed offered a refuge from the beast. It went slantingly down into the ground, a great tunnel, deep in the rock. They dropped into the opening and started forward, only to recoil at the fetid stench that a.s.sailed their nostrils.

"A bear pit," gasped Jerry. "Great Heavens! What a smell!"

They stopped, dismayed. Far below them in the bowels of some subterranean pa.s.sage was the crashing of loose stone; a scrambling and scratching of great claws came echoing to them. They leaped madly for the outer air.

"Over here," Jerry directed, and led the way, crouching, to the concealment of great stalks and vine-covered rocks. He pointed toward the open ground where they had been a few moments before. The tree-eater was out in full view. Its flabby, barrel-like body was squatted like that of some unearthly, giant toad, on ma.s.sive hind legs. It sat erect, its forelegs hung in air, as a hoa.r.s.e, snarling cry came from the cave. The great head, perched on the long leathery neck, waved from side to side.

The noise from the cave ceased. The rift in the earth was in plain sight from where they cowered, and the eyes of the men were upon it.

One instant it was empty; the next, in uncanny silence, it was filled with huge hideousness--an enormous, crouching beast.

It was black, a dull leathery black. Its thick, hairless hide hung in creases and folds on a gaunt frame. Shorter than the tree-eater, it was still a thing of mammoth ugliness. Its hind legs were powerful and armed with claws that curved deep into the earth; its front legs displayed the same fearful weapons. A thick, heavy tail slashed forward and back over the ground. And from this to the grinning, heavy-toothed jaws and beady eyes where the long neck ended in a warty head, it was an incarnation of pitiless ferocity.

Was the scent of the hidden, shuddering men in its red nostrils? It forgot them at the sight of the beast in the clearing. The snarling cry echoed hideously in the thin air as the frightful body came erect with neck extended, jaws open and dripping. It hurled itself through the air in one terrific leap.

Had there been any lingering hope in the minds of the men that they had no carnivores to deal with, the ensuing struggle ended it. The attacker tore great ma.s.ses of living flesh from the struggling, screaming body. The first c.u.mbersome brute was helpless before its destroyer.

Jerry was trembling and sick at the sight, but he grasped his companion's arm and drew him after as he slipped quietly away.

"To the high ground," he whispered. "It's our only hope. Perhaps we can fight them off there--find some steep rock we can climb." They worked their way desperately through the rubbery, obstructing growth.

At the foot of the hill there was better going; the bare rock gave winding and twisting pa.s.sage to the heights. They could have leaped over the stunted growths here, could have raced frantically for the high ground, but they dared not. To leap up into view of those fierce, searching eyes! It was unthinkable. They crouched low as they darted from their concealment to new shelter, and crawled behind rocks when open ground must be crossed.

They had dared regain hope when again the paralyzing scream ripped through the silence. It was answered by another and another from distant points. The valley of the caves was spewing out its loathsome dwellers from their winter's sleep.

The men raced openly now for the heights. As he leaped, Jerry turned to see over one shoulder a pursuer appear. It was one of the flesh-eaters, head to the ground on their trail. At sight of them its cry rang out again. It bounded forward in pursuit. And again there were answering screams from the jungle growth.

The men threw themselves frantically up the mountainside. Once Winslow landed in a sprawling heap and groaned as he drew himself to his feet.

The beast was below them. Jerry seized a great boulder, whose earth-weight would have made it immovable. He raised it above his head and sent it crashing down the slope.

Another and another he threw. One struck the great beast in mid-air; it was pure luck that drove the stone crashing against the creature's head. It fell back with a blood-chilling snarl that was half shriek.

Another monster appeared, to throw itself upon the first and tear at the crushed, waving head.

Jerry took his companion by the arm. His voice came strangled from his straining lungs. "Are you hurt?" he gasped. "Can you run?"

Winslow nodded breathlessly. Again they gathered themselves for their wild, leaping retreat toward the top. An uproar of furious fighting behind them marked where a score of the monsters had gathered for the feast.

Jerry watched vainly for some refuge, some pinnacle of rock or precipice they could climb, and from which they could beat down their attackers. There was nothing but the welter of volcanic waste: rock heaps and boulders and smooth streams of solid lava. Perhaps in the crater, he thought, over the ragged crest of the cone, might be some place of safety.

The pack was in full cry again as they climbed gaspingly to the top.

Beyond lay the funnel-shaped crater. Its vast inner slopes were less steep than the hill they had climbed. They were covered with a jungle, like those they had seen--a maze of red toadstools and distorted trees.

Jerry turned savagely to face the oncoming brutes. This, he knew, was the end. For this they had hurled themselves through s.p.a.ce--to make a morning morsel for these incredible beasts.