For awhile, he seemed to be passing through a zone of unnatural warmth, due, no doubt, to the presence of hidden volcanic activity. There were hot geysers, and gulfs from which sultry vapors rose, filling the air with queer, metallic-smelling gases that seemed to burn corrosively in his nostrils and lungs. Some remnant of his former scientific knowledge caused him to recoil from such neighborhoods and retrace his footsteps into caverns free of these gases.
Fleeing from one of the mephitic-laden caves, he found himself in a mile-wide chamber, lined with fungi of uncommon exuberance, amid whose luminiferous growths he met with one of his most terrible adventures. A vast and semi-ophidian monster, white as the other life-forms he had met, and equally legless but owning a single, Cyclopean, phosphoric eye, leapt upon him from the unearthly vegetation and hurled him to the ground with the ram-like impact of its blunt, shapeless head. He lay half-stunned, while the monster began to ingest him in its enormous maw, starting with his feet. Seemingly the metal which he wore was no barrier to its appetite. The creature had swallowed him nearly to the hips, when he recovered his senses and realized his frightful predicament.
Smitten with hideous terror, howling and gibbering like a caveman, he lifted the metal rod, which his clutching fingers had somehow retained, and struck frantically at the awful head into whose mouth he was being drawn by inches. The blows made little or no impression on the great rubbery mass; and soon he was waist-deep in the monstrous maw. In his dire need, a trace of reasoning-power returned to him; and using the rod like a rapier he thrust it into the immense, glaring eye, burying it to his hand, and probably penetrating whatever rudimentary semblance of brain the animal possessed. A pale and egg-like fluid oozed from the broken eye, and the slobbering lips tightened intolerably upon Howard, almost crushing him in what proved to be the death-spasm. The white, swollen barrel-thick body tossed for many minutes; and during its convulsions, Howard was knocked insensible. When he came to again, the creature was lying comparatively still; and the sack-like mouth had begun to relax, so that he was able to extricate himself from the dreadful gorge.
The shock of this experience completed his mental demoralization and drove him even further into primitive brutehood. At times, his brain was almost a blank; and he knew nothing, remembered nothing but the blind horror of those infra-planetary caverns and the dumb instinct that still impelled him to seek escape.
Several times, as he continued his way through the thickets of fungi, he was forced to flee or hide from other monsters of the same type as the one that had so nearly ingested him. Then he entered a region of steep acclivities that took him ever upward. The air became chill and the caverns were seemingly void of vegetable or animal life. He wondered dully as to the reason of the growing cold; but his broken mind could suggest no explanation.
Before entering this realm, he had supplied himself with another fragment of luminiferous fungus to light his way. He was groping through a mountain-like wilderness of chasms and riven scarps and dolomites, when, at some distance above, he saw with inexpressible fright a glimmering as of two cold green eyes that moved among the crags. He had virtually forgotten the Oumnis and their lamps; but something—half intuition, half memory—warned him of direr peril than any he had hitherto met in the darkness.
He dropped his luminous torch and concealed himself behind one of the dolomitic formations. From his hiding-place, he saw the passing of two of the Immortals, clad in silvery mouffa, who descended the scarp and vanished in the craggy gulfs below. Whether or not they were hunting for him, he could not know; but when they had gone from sight, he resumed his climb, hurrying at breakneck speed and feeling that he must get as far away as possible from the bearers of those icy green lights.
The dolomites dwindled in size, and the steep chamber narrowed like the neck of a bottle and closed in upon him presently from all sides, till it was only a narrow, winding passage. The floor of the passage became fairly level. Anon, as he followed it, he was startled and blinded by a glare of light directly ahead—a light that was brilliant as pure sunshine. He cowered and stepped back, shielding his eyes with his hands till they became somewhat tempered to the glare. Then, stealthily, with a mingling of confused fears and dim, unworded hopes, he crept toward the light and came out in an endless metal hall, apparently deserted but filled as far as eye could see with the apparently sourceless brilliance.
The mouth of the rough natural passage from which he had emerged was fitted with a sort of valve, which had been left open, doubtless by the Immortals he had seen among the nether crags. The boat-shaped vehicle they had used was standing in the hall. This vehicle, and the hall itself, were familiar to him, and he began to recollect, in a partial way, the ordeals he had undergone among the Oumnis before his flight into outer darkness.
The hall was slightly inclined; and he seemed to remember that the upward grade would presumably lead to a lost world of freedom. Apprehensively and furtively, he began to follow it, loping like an animal.
After he had gone for perhaps a mile, the floor became perfectly level, but the hall itself started to turn in a sort of arc. He was unable to see very far ahead. Then, so abruptly that he could not check his headlong flight, he came in view of three Oumnis, clothed in metal, who were all standing with their backs to him. A boat-vehicle was near at hand. One of the Immortals was tugging at a huge, capstan-like bar that protruded from the wall of the passage; and as if in response to the bar, a sort of gleaming metal valve was descending slowly from the roof. Inch by inch, it came down like a mighty curtain; and soon it would close the entire passage and render impossible the earth-man’s egress.
Somehow, it did not occur to Howard that the tunnel beyond the valve might lead to other realms than the outer air for which he longed so desperately. As if by a miracle, something of his former courage and resourcefulness had returned to him; and he did not turn and flee incontinently at sight of the Immortals, as he would have done a short time before. He felt that now or never was his opportunity to escape from the sub-Mercutian levels.
Leaping forward on the unsuspecting Oumnis, all of whom were intent on the closing of the valve, he struck at the foremost with his metal bar. The Mercutian toppled and went down with a clattering of mouffa on the floor. The one who was operating the lever continued his task, and Howard had no time to strike him down, for the remaining Immortal, with tigerish agility, had sprung back and was levelling the deadly fire-tube which he carried.
Howard saw that the great valve was still descending—was barely two feet above the cavern floor. He made a flying dive for the opening, sprawling on all fours and then crawling prone on his stomach beneath the terrible curtain of metal.
Struggling to rise, he found himself impeded and held back. He was in utter darkness now; but getting to his knees and groping about, he determined the cause of his retardation. The fallen valve had caught the loose elongated heel of the mouffa on his right foot. He had all the sensations of a trapped animal as he sought to wrench himself free. The tough mouffa held, weighed down by the enormous valve; and it seemed that there was no escape.
Then, amid his desperation, he somehow remembered that the mouffa-armor was open at the breast. Awkwardly and painfully, he managed to crawl forth from it, leaving it there like a discarded lizard-skin.
Getting to his feet, he raced on in the darkness. He was without light, for he had dropped the phosphorescent bough in his dive under the closing valve. The cavern was rough and flinty to his naked feet; and he felt an icy wind, bleak as the breath of glaciers, that blew upon him as he went. The floor sloped upward, and in places it was broken into stair-like formations against which he stumbled and fell, bruising himself severely. Then he cut his head cruelly on a sharp stone that projected from the low roof. The wet, warm blood flowed down across his brow and into his eyes.