Revenge was bitter; he no longer cared for it. Garnet had been a pawn in his game, no more. She had alibied him from association with the blue garnet by agreeing that they had been making love at the critical time. It was a more pleasant memory than the truth: that he had raped her once and found her wanting. Now she shared the blame for Framy’s death, and knew it.

“There is no escape,” he said, talking as much to himself as to her. “I tried to break her hold, but she reached across the light-years to strike me down.” Why did he tell his secrets to this woman? he wondered. Had he really captured Garnet for revenge, or merely because he needed a foil, a property, even in Chthon? Did he understand any part of his own motives?

11

Two more marches brought them to really spacious caverns. The ceiling towered into a lofty gloom, and passages were a hundred feet across. The wind was no more than a fading whisper, and it was cool: distinctly disconcerting, in Chthon. There was a feeling, an expectation; the caverns could not continue much longer. The steady rise must already have brought them very near the surface.

The walls peeled back abruptly. They stood on the brink of the passage termination: an enormous chasm, so wide that the farther shore was lost in dark obscurity, so deep that toppling pebbles never returned the sound of their landing.

They gathered apprehensively, two hundred men and women milling at the brink. On either side the floor ended; there was no way around.

“Fire a torch,” Bossman snapped.

One of the rare brands was lighted, sputtering its yellow light with unfamiliar brilliance. Holding it aloft, Bossman stood at he edge and looked down.

“They ain’t supposed to burn that way,” someone muttered. “That’s too fierce.”

“How would you know?” another said. “Three years since you saw real light, ain’t it?” the ceiling of the chasm became visible as the light flared up. It was nearer than Aton had thought, within fifty feet, a mass of depending porous formations like an undersea landscape, from which streamers of opaque vapor drifted down. There was something ominous about it. What vapor was heavier than air? But the far side was still out of sight, and the depths into which the mist descended were murky.

Bossman shouted, and the echo took ten seconds.

“There’s one way to find out how deep this thing is,” a man suggested.

Bossman smiled.

“No!” Hastings exclaimed, jumping ponderously to stop him. But he was too late. Bossman had flung the torch into the gulf.

Hastings stared in horror. “That’s gas, you fool,” he said. “It’ll burn.”