There was a rhythmic vibration in the rope. Brett felt it through his hands, a fine sawing sensation ...
He was falling, gripping the limp rope ...
He slammed on his back in three feet of oily water. The coils of rope collapsed around him with a sustained splashing. He got to his feet, groped for the end of the rope. The glossy nylon strands had been cleanly cut.
For half an hour Brett waded in waist-deep water along a wall of damp clay that rose sheer above him. Far above, bars of dim sunlight crossed the upper reaches of the cavern. He had seen no sign of Dhuva ... or the Gels.
He encountered a sodden timber that projected above the surface of the pool, clung to it to rest. Bits of flotsam—a plastic pistol, bridge tallies, a golf bag—floated in the black water. A tunnel extended through the clay wall ahead; beyond, Brett could see a second great cavern rising. He pictured the city, silent and empty above, and the honey-combed earth beneath. He moved on.
An hour later Brett had traversed the second cavern. Now he clung to an outthrust spur of granite directly beneath the point at which Dhuva had disappeared. Far above he could see the green-clad waitress standing stiffly on her ledge. He was tired. Walking in water, his feet floundering in soft mud, was exhausting. He was no closer to escape, or to finding Dhuva, than he had been when the fat man cut the rope. He had been a fool to leave the man alone, with a knife ... but he had had no choice.
He would have to find another way out. Endlessly wading at the bottom of the pit was useless. He would have to climb. One spot was as good as another. He stepped back and scanned the wall of clay looming over him. Twenty feet up, water dripped from the broken end of a four-inch water main. Brett uncoiled the rope from his shoulder, tied a loop in the end, whirled it and cast upward. It missed, fell back with a splash. He gathered it in, tried again. On the third try it caught. He tested it, then started up. His hands were slippery with mud and water. He twined the rope around his legs, inched higher. The slender cable was smooth as glass. He slipped back two feet, then inched upward, slipped again, painfully climbed, slipped, climbed.
After the first ten feet he found toe-holds in the muddy wall. He worked his way up, his hands aching and raw. A projecting tangle of power cable gave a secure purchase for a foot. He rested. Nearby, an opening two feet in diameter gaped in the clay: a tunnel. It might be possible to swing sideways across the face of the clay and reach the opening. It was worth a try. His stiff, clay-slimed hands would pull him no higher.
He gripped the rope, kicked off sideways, hooked a foot in the tunnel mouth, half jumped, half fell into the mouth of the tunnel. He clung to the rope, shook it loose from the pipe above, coiled it and looped it over his shoulder. On hands and knees he started into the narrow passage.