Haines and Chanler, filled with curiosity, were prompted to ask many questions, but most of these were answered vaguely and ambiguously by Ta-Vho-Shai, who seemed eager to continue his ciceronage through other and ulterior parts of Ravormos. He could tell them nothing about the chemical nature of the gases; and Vulthoom himself, if the veracity of Ta-Vho-Shai could be trusted, was a mystery even to his own followers, most of whom had never beheld him in person.
Ta-Vho-Shai conducted the earth-men from the room of bottles, and down a long straight cavern, wholly deserted, where a rumbling and pounding as of innumerable engines came to meet them. The sound broke upon them like a Niagara of evil thunders when they emerged finally in a sort of pillared gallery that surrounded a mile-wide gulf illumined by the terrible flaring of tongued fires that rose incessantly from its depths.
It was as if they looked down into some infernal circle of angry light and tortured shadow. Far beneath, they saw a colossal structure of curved and glittering girders, like the strangely articulated bones of a metal behemoth outstretched along the bottom of the pit. Around it, furnaces belched like the flaming mouths of dragons; tremendous cranes went up and down perpetually with a motion as of long-necked plesiosaurs; and the figures of giants, red as laboring demons, moved through the sinister glare.
“They build the ether-ship in which Vulthoom will voyage to the Earth,” said Ta-Vho-Shai. “When all is ready, the ship will blast its way to the surface by means of atomic disintegrators. The very stone will melt before it like vapor. Ignar-Luth, which lies directly above, will be consumed as if the central fires of the planet had broken loose.”
Haines and Chanler, appalled, could offer no rejoinder. More and more they were stunned by the mystery and magnitude, the terror and menace, of this unsuspected cavern-world. Here, they felt, a malign Power, armed with untold arcana of science, was plotting some baleful conquest; a doom that might involve the peopled worlds of the system was being incubated in secrecy and darkness. They, it seemed, were helpless to escape and give warning, and their own fate was shadowed by insoluble gloom.
A gust of hot, metallic vapor, mounting from the abyss, burned corrosively in their nostrils as they peered from the gallery’s verge. Ill and giddy, they drew back.
“What lies beyond this gulf?” Chanler inquired, when his sickness had passed.
“The gallery leads to other caverns, little used, which conduct on the dry bed of an ancient underground river. This river-bed, running for many miles, emerges in a sunken desert far below sea-level, and lying to the west of Ignarh.”
The earth-men started at this information, which seemed to offer them a possible avenue of escape. Both, however, thought it well to dissemble their interest. Pretending fatigue, they asked the Aihai to lead them to some chamber in which they could rest awhile and could discuss at leisure the proposition of Vulthoom.
Ta-Vho-Shai, professing himself at their service in all ways, took them to a small room beyond the laboratories. It was a sort of bed-chamber, with two tiers of couches along the walls. These couches, from their length, were evidently designed to accommodate the giant Martians. Here Haines and Chanler were left alone by Ta-Vho-Shai who had tacitly inferred that his presence was no longer needed.
“Well,” said Chanler, “it looks as if there were a chance of escape if we can only reach that river bed. I took careful note of the corridors we followed on our return from the gallery. It should be easy enough—unless we are being watched without our knowledge.”
“The only trouble is, it’s too easy…. But anyway, we can try. Anything would be better than waiting around like this. After what we’ve seen and heard, I’m beginning to believe that Vulthoom really is the Devil—even though he doesn’t claim to be.”
“Those ten-foot Aihais give me the creeps,” said Chanler. “I can readily believe they are a million years old, or thereabouts. Enormous longevity would account for their size and stature. Most animals that survive beyond the normal term of years become gigantic; and it stands to reason that these Martian men would develop in a similar fashion.”
It was a simple matter to retrace their route to the pillared gallery that encircled the great abyss. For most of the distance, they had only to follow a main corridor; and the sound of the rumbling engineries alone would have guided them. They met no one in the passages; and the Aihais that they saw through open portals in laboratory rooms were deeply intent on enigmatic chemistries.
“I don’t like this,” muttered Haines. “It’s too good to be true.”
“I’m not so sure of that. Perhaps it simply hasn’t occurred to Vulthoom and his followers that we might try to escape. After all, we know nothing about their psychology.”
Keeping close to the inner wall, behind the thick pillars, they followed the long, slowly winding gallery on the right hand. It was lit only by the shuddering reflection of the tall flames in the pit below. Moving thus, they were hidden from the view of the laboring giants, if any of these had happened to look upward. Poisonous vapors were blown toward them at intervals, and they felt the hellish heat of the furnaces; and the clangors of welding, the thunder of obscure machineries, beat upon them as they went with reverberations that were like hammer-blows.
By degrees they rounded the gulf, and came at last to its further side, where the gallery curved backward in its return toward the entrance corridor. Here, in the shadows, they discerned the unlit mouth of a large cavern that radiated from the gallery.
This cavern, they surmised, would lead them toward the sunken river-bed of which Ta-Vho-Shai had spoken. Haines, luckily, carried a small pocket-flash, and he turned its ray into the cavern, revealing a straight corridor with numerous minor intersections. Night and silence seemed to swallow them at a gulp, and the clangors of the toiling Titans were quickly and mysteriously muted as they hurried along the empty hall.
The roof of the corridor was fitted with metal hemispheres, now dark and rayless, that had formerly served to illumine it in the same fashion as the other halls of Ravormos. A fine dust was stirred by the feet of the earth-men as they fled; and soon the air grew chill and thin, losing the mild and somewhat humid warmth of the central caverns. It was plain, as Ta-Vho-Shai had told them, that these outer passages were seldom used or visited.
It seemed that they went on for a mile or more in that Tartarean corridor. Then the walls began to straiten, the floor roughened and fell steeply. There were no more cross-passages, and hope quickened in the earth-men as they saw plainly that they had gone beyond the artificial caverns into a natural tunnel. The tunnel soon widened, and its floor became a series of shelf-formations. By means of these, they descended into a profound abyss that was obviously the river-channel of which Ta-Vho-Shai had told them.
The small flashlight barely sufficed to reveal the full extent of this underground waterway, in which there was no longer even a trickle of its prehistoric flood. The bottom, deeply eroded, and riffled with sharp boulders, was more than a hundred yards wide; and the roof arched into gloom irresoluble. Exploring the bottom tentatively for a little distance, Haines and Chanler determined by its gradual falling the direction in which the stream had flowed. Following this downward course, they set out resolutely, praying that they would find no impassable barriers, no precipices of former cataracts to impede or prevent their egress in the desert. Apart from the danger of pursuit, they apprehended no other difficulties than these.