Made doubly cautious by their disconcerting experiences, they started along the rim of the sink. For some distance the ground was littered with detritus, and even with loose boulders that had rolled upward to be arrested at the top. When they came to the end of this rubble, they surmised that they were beyond the belt of reverse gravitation.

Following the rim toward a point where the slope assumed an easier gradient, they came suddenly into a zone of heavier gravity than any they had yet entered. At one step their weight appeared to treble; a crushing burden descended upon them; and they could lift their feet only with immense effort.

Struggling against the uncanny pull of the strange earth, they heard an indescribable clattering and rustling behind them, and turned their heads laboriously, in much startlement, to ascertain the cause.

Emerging as if from empty air, a concourse of unimaginably monstrous beings had gathered at their very heels on the bleak verge of the plateau. There were scores or hundreds of these entities, who, whether mere beasts or the analogues of humanity, were no less various and freakish in their conformation than the weird flora of the valley-bottom.

Obviously, there was no common norm or type of development as in the terrestrial species. Some of the entities were no less than twelve or thirteen feet tall; others were squat pygmies. Limbs, bodies, and sense-organs were equally diversified. One creature was like a prodigious moonfish mounted on stilts. Another was a legless, rolling globe fringed about the equator with prehensile ropes that served to haul it along by attaching themselves to projections. Still another resembled a wingless bird with a great falcon beak and a tapering serpentine body with lizard legs, that glided half-erect. Some of the creatures possessed double or triple bodies; some were hydra-headed, or equipped with an excessive number of limbs, eyes, mouths, ears and other anatomical features.

Truly these beings were the spawn of chance, the random creations of a lawless biologic force. A horde of fabulous, fantastic nightmare improbabilities, they surged forward upon Morris and Markley, uttering a babel of wordless sounds, of cacklings, hisses, clucks, ululations, roarings and bellowings. Whether they were hostile or merely curious, the earth-men could not decide. Both were petrified with a horror beyond the horror of evil dreams.

The leaden gravitational drag, rendering the least movement slow and toilsome, re-enforced their sensation of nightmare. Laboriously they drew their pistols, and half-lifting them at the oncoming rout, pulled the triggers. The reports were dull and muffled; the bullets flew with visible slowness, and rebounded harmlessly like tossed pebbles from the monsters that they struck.

Like a stampeding herd, the throng of biologic horrors was upon Morris and Markley. Battling against the gravity as well as against the loathsome bodies and members that engulfed them, they were borne irresistibly along by the seething mass. Their pistols were torn from their hands, they beheld hideous faces and faceless things that milled about them like a torrent of the damned in some nether circle. Occasionally, in broken glimpses, they saw a disordered landscape of amorphous rocks, with pools and streams of fine sand, and sudden, fortuitous vegetation like mad mirages, through which they were being carried.

The origin of the monsters, their purpose, their destination, their intention in regard to the earth-men, were enigmatic as the riddles of delirium. Resistance was futile; and Morris and Markley gave themselves up to the rushing motion of the throng, in the hope that some opportunity of escape would ultimately offer itself.

They seemed to go on for hours. The gravitation still varied, but was often constant over large areas. The sun, instead of sinking further, rose again to the zenith. Sometimes there were brief intervals of darkness, as if the light had been shut off by some queer fluctuation of atmospheric properties. Puffs of wild wind arose and died. Rocks and whole hummocks seemed to crumble abruptly on the waste. But through all this chaos of conditions, the monstrous horde poured onward with its captives.

Apparently the earth-men had fallen in with a whole tribe of these anomalous creatures, who were perhaps migrating from one zone of their random world to another. At least, such was the explanation that suggested itself in lieu of positive knowledge.

Markley and Morris became aware that the ground was slanting downward. Over the heads of the monsters, they saw that they had entered a flat sloping valley. Rough mountains, perhaps the same that they had beheld from the rim of the sink, appeared to loom at no great distance above them.

The low valley debouched in a sort of shallow, crater-like hollow. Here the horde suddenly arrested its onward rush and began to spread out in a curious manner. Markley and Morris, now able to work their way forward, saw that the creatures had arranged themselves in a ring about the slopes of the circular hollow, leaving a clear space at its bottom.

Chapter IV

The Pit of Dissolution

In the center of the vacant space, a singular phenomenon was manifesting itself. A fountain of fine, hueless powder rose from the stone and soil, attaining a height of three feet. Slowly but acceleratively it widened and rose higher, preserving the form of a round column. Its top mushroomed into a vague cloud, spreading above the heads of the assembled throng and floating skyward. It was as if some process of molecular dissolution were taking place to form this fountain.

Markley and Morris were fascinated by the spectacle. Before them, the silent, circular crumbling of the ground went on, the column swelled to titanic proportions, towering above the crater. Seemingly, too, the monsters were fascinated, for none of them stirred to break the ring-like formation.

Then, gradually, as the column of atoms increased, the horde began to surge forward. The ring narrowed till its inmost ranks were driven, close-packed, into the fountain by the pressure from behind. Visibly, as the creatures entered it, their limbs and bodies melted like bursting puff-balls, to swell the columnar cloud of dissolution that mounted skyward.

“Are they all going to commit suicide and take us with them?” Markley’s voice was a horror-tautened whisper. He and Morris, caught in the forward ranks, were being forced slowly toward the fountain. Only two rows of the monsters now intervened; and even as Markley spoke, the bodies of the inmost row began to dissolve in the column.

The earth-men struggled desperately against the massed bodies that crowded from behind. But the living wall, close and implacable, as if bent on nothing but self-immolation, drove them downward inch by inch.

Overhead, the sun was blinded by the mushrooming column. The sky took on a madder-brown twilight. Then, with a suddenness as of some atmospheric legerdemain, the twilight blacked into Cimmerian darkness. A mad, elemental howling tore the air, a blind hurricane filled the crater, blowing as if from above; and bolts of lightning leapt upward from the ground, enshrouding with blue and violet fire the horrible horde of biologic anomalies.

The pressure behind the earth-men relaxed. A panic seemed to have seized the monsters, who were now dispersing in the bolt-riven darkness. The earth-men, fighting their way upward, stumbled over the half-charred bodies of those who had been slain by the lightning. By intermittent flashes, they saw, looking back, that the column of atomic dissolution still poured from the crater’s bottom, to merge with the seething storm that had risen as if at random from nowhere.

Miraculously untouched by the lightning, Morris and Markley found themselves in the flat valley through which they had entered the crater. Most of the monsters had now disappeared, melting away like the shadow of a nightmare; and the last flashes revealed little but vacant soil and rock.