The floor of the cave covered an area the size of a city block. It was blanketed with human bones, with here and there a small cat skeleton or the fanged snout-bones of a dog. There was a constant rustling of rats that played among the rib cages, sat atop crania, scuttled behind shin-bones. Brett picked his way, stepping over imitation pearl necklaces, zircon rings, plastic b.u.t.tons, hearing aids, lipsticks, compacts, corset stays, prosthetic devices, rubber heels, wrist watches, lapel watches, pocket watches with corroded bra.s.s chains.

Ahead Brett saw a patch of color: a blur of pale yellow. He hurried, stumbling over bone heaps, crunching eyegla.s.ses underfoot. He reached the still figure where it lay slackly, face down. Gingerly he squatted, turned it on its back. It was Dhuva.

Brett slapped the cold wrists, rubbed the clammy hands. Dhuva stirred, moaned weakly. Brett pulled him to a sitting position. "Wake up!" he whispered. "Wake up!"

Dhuva"s eyelids fluttered. He blinked dully at Brett.

"The Gels may turn up any minute," Brett hissed. "We have to get away from here. Can you walk?"

"I saw it," said Dhuva faintly. "But it moved so fast ..."

"You"re safe here for the moment," Brett said. "There are none of them around. But they may be back. We"ve got to find a way out!"

Dhuva started up, staring around. "Where am I?" he said hoa.r.s.ely. Brett seized his arm, steadied him on his feet.

"We"re in a hollowed-out cave," he said. "The whole city is undermined with them. They"re connected by tunnels. We have to find one leading back to the surface."

Dhuva gazed around at the acres of bones. "It left me here for dead."

"Or to die," said Brett.

"Look at them," Dhuva breathed. "Hundreds ... thousands ..."

"The whole population, it looks like. The Gels must have whisked them down here one by one."

"But why?"

"For interfering with the scenes. But that doesn"t matter now. What matters is getting out. Come on. I see tunnels on the other side."

They crossed the broad floor, around them the white bones, the rustle of rats. They reached the far side of the cave, picked a six-foot tunnel which trended upward, a trickle of water seeping out of the dark mouth.

They started up the slope.

"We have to have a weapon against the Gels," said Brett.

"Why? I don"t want to fight them." Dhuva"s voice was thin, frightened.

"I want to get away from here ... even back to Wavly. I"d rather face the Duke."

"This was a real town, once," said Brett. "The Gels have taken it over, hollowed out the buildings, mined the earth under it, killed off the people, and put imitation people in their place. And n.o.body ever knew. I met a man who"s lived here all his life. He doesn"t know. But we know ... and we have to do something about it."

"It"s not our business. I"ve had enough. I want to get away."

"The Gels must stay down below, somewhere in that maze of tunnels. For some reason they try to keep up appearances ... but only for the people who belong here. They play out scenes for the fat man, wherever he goes.

And he never goes anywhere he isn"t expected to."

"We"ll get over the wall somehow," said Dhuva. "We may starve, crossing the dry fields, but that"s better than this."

They emerged from the tunnel into a coal bin, crossed to a sagging door, found themselves in a boiler room. Stairs led up to sunlight. In the street, in the shadow of tall buildings, a boxy sedan was parked at the curb. Brett went to it, tried the door. It opened. Keys dangled from the ignition switch. He slid into the dusty seat. Behind him there was a hoa.r.s.e scream. Brett looked up. Through the streaked windshield he saw a mighty Gel rear up before Dhuva, who crouched back against the blackened brick front of the building.

"Don"t move, Dhuva!" Brett shouted. Dhuva stood frozen, flattened against the wall. The Gel towered, its surface rippling.

Brett eased from the seat. He stood on the pavement, fifteen feet from the Gel. The rank Gel odor came in waves from the creature. Beyond it he could see Dhuva"s white terrified face.

[Ill.u.s.tration]

Silently Brett turned the latch of the old-fashioned auto hood, raised it. The copper fuel line curved down from the firewall to a gla.s.s sediment cup. The knurled retaining screw turned easily; the cup dropped into Brett"s hand. Gasoline ran down in an amber stream. Brett pulled off his damp coat, wadded it, jammed it under the flow. Over his shoulder he saw Dhuva, still rigid--and the Gel, hovering, uncertain.

The coat was saturated with gasoline now. Brett fumbled a match box from his pocket. Wet. He threw the sodden container aside. The battery caught his eye, clamped in a rusted frame under the hood. He jerked the pistol from its holster, used it to short the terminals. Tiny blue sparks jumped. He jammed the coat near, rasped the gun against the soft lead poles. With a whoosh! the coat caught; yellow flames leaped, soot-rimmed. Brett s.n.a.t.c.hed at a sleeve, whirled the coat high. The great Gel, attracted by the sudden motion, rushed at him. He flung the blazing garment over the monster, leaped aside.

The creature went mad. It slumped, lashed itself against the pavement.

The burning coat was thrown clear. The Gel threw itself across the pavement, into the gutter, sending a splatter of filthy water over Brett. From the corner of his eye, Brett saw Dhuva seize the burning coat, hurl it into the pooled gasoline in the gutter. Fire leaped twenty feet high; in its center the great Gel bucked and writhed. The ancient car shuddered as the frantic monster struck it. Black smoke boiled up; an unbelievable stench came to Brett"s nostrils. He backed, coughing.

Flames roared around the front of the car. Paint blistered and burned. A tire burst. In a final frenzy, the Gel whipped clear, lay, a great blackened shape of melting rubber, twitching, then still.

"They"ve tunneled under everything," Brett said. "They"ve cut through power lines and water lines, concrete, steel, earth; they"ve left the sh.e.l.l, sh.o.r.ed up with spidery-looking trusswork. Somehow they"ve kept water and power flowing to wherever they needed it--"

"I don"t care about your theories," Dhuva said; "I only want to get away."

"It"s bound to work, Dhuva. I need your help."

"No."

"Then I"ll have to try alone." He turned away.

"Wait," Dhuva called. He came up to Brett. "I owe you a life; you saved mine. I can"t let you down now. But if this doesn"t work ... or if you can"t find what you want--"

"Then we"ll go."

Together they turned down a side street, walking rapidly. At the next corner Brett pointed.

"There"s one!" They crossed to the service station at a run. Brett tried the door. Locked. He kicked at it, splintered the wood around the lock.

He glanced around inside. "No good," he called. "Try the next building.

I"ll check the one behind."

He crossed the wide drive, battered in a door, looked in at a floor covered with wood shavings. It ended ten feet from the door. Brett went to the edge, looked down. Diagonally, forty feet away, the underground fifty-thousand-gallon storage tank which supplied the gasoline pumps of the station perched, isolated, on a column of striated clay, ribbed with chitinous Gel b.u.t.tresses. The truncated feed lines ended six feet from the tank. From Brett"s position, it was impossible to say whether the ends were plugged.

Across the dark cavern a square of light appeared. Dhuva stood in a doorway looking toward Brett.

"Over here, Dhuva!" Brett uncoiled his rope, arranged a slip-noose. He measured the distance with his eye, tossed the loop. It slapped the top of the tank, caught on a ma.s.sive fitting. He smashed the gla.s.s from a window, tied the end of the rope to the center post. Dhuva arrived, watched as Brett went to the edge, hooked his legs over the rope, and started across to the tank.

It was an easy crossing. Brett"s feet clanged against the tank. He straddled the six-foot cylinder, worked his way to the end, then clambered down to the two two-inch feed lines. He tested their resilience, then lay flat, eased out on them. There were plugs of hard waxy material in the cut ends of the pipes. Brett poked at them with the pistol. Chunks loosened and fell. He worked for fifteen minutes before the first trickle came. Two minutes later, two thick streams of gasoline were pouring down into the darkness.

Brett and Dhuva piled sticks, sc.r.a.ps of paper, shavings, and lumps of coal around a core of gasoline-soaked rags. Directly above the heaped tinder a taut rope stretched from the window post to a child"s wagon, the steel bed of which contained a second heap of combustibles. The wagon hung half over the ragged edge of the floor.