The illuminated part of the giant pit was as bizarre as the landscape of a nightmare. There were purplish trees, immense beyond belief.

There were broad, smooth pools of inky black fluid that was oily and troubled in spots as though disturbed by some moving things under the surface. There were bare, rocky patches where the stones, the long drippings of ancient lava flow, were spread like bleaching gray skeletons of monsters. And over all, rising from pools and bare ground and jungle alike, was a thin, miasmic mist.

Sustained by the slow, steady exhaust of the motor, rising a little with each partly m.u.f.fled explosion and sinking a little further in each interval, they settled toward a bare, lava strewn spot that appealed to Wichter as being a good landing place. With a last hiss, and a grinding jar, they grounded. Joyce opened the switch to cut off the generator.

"Now let's see what the air's like," said Wichter, lifting down a small cage in which was penned an active rat.

He opened a double panel in the sh.e.l.l's hull, and freed the little animal. In an agony of suspense they watched it as it leaped onto the bare lava and halted a moment....

"Seems to like it," said Joyce, drawing a great breath.

The rat, as though intoxicated by its sudden freedom, raced away out of sight, covering eight or ten feet at a bound, its legs scurrying ludicrously in empty air during its short flights.

"That means that we can dispense with oxygen helmets--and that we'd better take our guns," said Wichter, his voice tense, his eyes snapping behind his gla.s.ses.

He stepped to the gun rack. In this were half a dozen air-guns. Long and of very small bore, they discharged a tiny steel sh.e.l.l in which was a liquid of his invention that, about a second after the heat of its forced pa.s.sage through the rifle barrel, expanded instantly in gaseous form to millions of times its liquid bulk. It was the most powerful explosive yet found, but one that was beautifully safe to carry inasmuch as it could be exploded only by heat.

"Are we ready?" he said, handing a gun to Joyce. "Then--let's go!"

But for a breath or two they hesitated before opening the heavy double door in the side of the hull, savoring to the full the immensity of the moment.

The rapture of the explorer who is the first to set foot on a vast new continent was theirs, magnified a hundredfold. For they were the first to set foot on a vast new planet! An entire new world, containing heaven alone knew what forms of life, what monstrous or infinitesimal creatures, lay before them. Even the profound awe they had experienced when landing on the moon was dwarfed by the solemnity of this occasion; just as it is less soul stirring to discover an arctic continent which is perpetually cased in barren ice, than to discover a continent which is warmly fruitful and, probably, teeming with life.

Still wordless, too stirred to speak, they opened the vault-like door and stepped out--into a humid heat which was like that of their own tropical regions, but not so unendurable.

In their short stay on the moon, during which they had taken several walks in their insulated suits, they had become somewhat accustomed to the decreased weight of their bodies due to the lesser gravity, so that here, where their weight was even less, they did not make any blunders of stepping twenty feet instead of a yard.

Walking warily, glancing alertly in all directions to guard against any strange animals that might rush out to destroy them, they moved toward the nearest stretch of jungle.

The first thing that arrested their attention was the size of the trees they were approaching. They had got some idea of their hugeness from the sh.e.l.l, but viewed from ground level they loomed even larger.

Eight hundred, a thousand feet they reared their mighty tops, with trunks hundreds of feet in circ.u.mference; living pyramids whose bases wove together to make an impenetrable ceiling over the jungle floor.

The leaves were thick and bloated like cactus growths, and their color was a p.r.o.nounced lavender.

"We must take back several of those leaves," said Wichter, his scientific soul filled with cold excitement.

"I wish we could take back some of this air, too." Joyce filled his lungs to capacity. "Isn't it great? Like wine! It almost counteracts the effects of the heat."

"There's more oxygen in it than in our own," surmised Wichter. "My G.o.d! What's that!"

They halted for an instant. From the depths of the lavender jungle had come an ear shattering, screaming hiss, as though some monstrous serpent were in its death agony.

They waited to hear if the noise would be repeated. It wasn't.

Dubiously they started on again.

"We'd better not go in there too far," said Joyce. "If we didn't come out again it would cost Earth a new planet. No one else knows the secret of your water-motor."

"Oh, nothing living can stand against these guns of ours," replied Wichter confidently. "And that noise might not have been caused by anything living. It might have been steam escaping from some volcanic crevice."

They started cautiously down a well defined, hard packed trail through th.o.r.n.y lavender underbrush. As they went, Joyce blazed marks on various tree trunks marking the direction back to the sh.e.l.l. The tough fibres exuded a bluish liquid from the cuts that bubbled slowly like blood.

To the right and left of them were cup-shaped bushes that looked like traps; and that their looks were not deceiving was proved by a m.u.f.fled, bleating cry that rose from the compressed leaves of one of them they pa.s.sed. Sluggish, blind crawling things like three-foot slugs flowed across their path and among the tree trunks, leaving viscous trails of slime behind them. And there were larger things....

"Careful," said Wichter suddenly, coming to a halt and peering into the gloom at their right.

"What did you see?" whispered Joyce.

Wichter shook his head. The gigantic, two-legged, purplish figure he had dimly made out in the steamy dark, had moved away. "I don't know.

It looked a little like a giant ape."

They halted and took stock of their situation, mechanically wiping perspiration from their streaming faces, and pondering as to whether or not they should turn back. Joyce, who was far from being a coward, thought they should.

"In this undergrowth," he pointed out, "we might be rushed before we could even fire our guns. And we're nearly a mile from the sh.e.l.l."

But Wichter was like an eager child.

"We'll press on just a little," he urged. "To that clear spot in front of us." He pointed along the trail to where sunlight was blazing down through an opening in the trees. "As soon as we see what's there, we'll go back."

With a shrug, Joyce followed the eager little man down the weird trail under the lavender trees. In a few moments they had reached the clearing which was Wichter's goal. They halted on its edge, gazing at it with awe and repulsion.

It was a circular quagmire of festering black mud about a hundred yards across. Near at hand they could see the mud heaving, very slowly, as though abysmal forms of life were tunneling along just under the surface. They glanced toward the center of the bog, which was occupied by one of the smooth black pools, and cried aloud at what they saw.

At the brink of the pool was lying a gigantic creature like a great, thick snake--a snake with a lizard's head, and a series of many-jointed, scaled legs running down its powerful length. Its mouth was gaping open to reveal hundreds of needle-sharp, backward pointing teeth. Its legs and thick, stubbed tail were threshing feebly in the mud as though it were in distress; and its eyes, so small as to be invisible in its repulsive head, were glazed and dull.

"Was that what we heard back a ways?" wondered Joyce.

"Probably," said Wichter. His eyes shone as he gazed at the nightmare shape. Impulsively he took a step toward the stirring mud.

"Don't be entirely insane," snapped Joyce, catching his arm.

"I must see it closer," said Wichter, tugging to be free.

"Then we'll climb a tree and look down on it. We'll probably be safer up off the ground anyway."

They ascended the nearest jungle giant--whose rubbery bark was so ringed and scored as to be as easy to climb as a staircase--to the first great bough, about fifty feet from the ground, and edged out till they hung over the rim of the quagmire. From there, with the aid of their binoculars, they expected to see the dying monster in every detail. But when they looked toward the pool it was not in sight!

"Were we seeing things?" exclaimed Wichter, rubbing his gla.s.ses. "I'd have sworn it was lying there!"