The heat energy released by the wood's burning nuclei was contained in great, reinforced vessels — boilers — in another part of the Harbor complex. Superfluid Air, fleeing the heat, was used to drive pistons. These pistons were immense fists of hardened wood twice Farr's height which plunged into their jackets as steady as a heartbeat.

The pistons, via huge, splintered rotary arms, turned pulleys; and it was the pulleys which sent Bells full of fearful Fishermen toward the mysterious and deadly depths of the underMantle.

It was so different from his life with the Human Beings, where there were no devices more complex than a spear, no source of power save the muscles of humans or animals. The Harbor was like an immense machine, with the sole purpose of sending Fishermen down into the underMantle. He felt as if he were a component of that huge machine himself, or as if he were laboring inside the heart of some giant built of wood and rope...

Bzya apart, the other workers showed no signs of accepting Farr. It was as if their unhappiness with their lot, here in this noisy, stinking inferno, had been turned inward on themselves, and on each other. But still, once each new shift had settled in, the workers seemed to reach a certain rhythm, and a mood of companionship settled over the line — a mood which, Farr sensed, extended even to him, as long as he kept his mouth shut.

He missed Dura, and the rest of the Human Beings, and he missed his old life in the upflux. Of course he did. His sentence in this Harbor seemed to stretch off to eternity. But he was able to accept his lot, as long as he kept his mind focused on the task in hand, and took comforts where he could find them. One shift at a time, that was the secret, as Bzya had told him. And...

"You."

There was a hand on his shoulder, grasping at his grubby tunic. He was roughly dragged out of the line.

Hosch glared at him, his nostrils glowing sickly-white. "Change of assignment," he growled.

"What?"

"A Bell," Hosch said.

—

As Dura approached — with twenty other new coolies in a huge car drawn by a dozen stout Air-pigs — Frenk's ceiling-farm seemed tiny at first, a child's palmprint against the immensity of the Crust itself. The other coolies seemed more interested in another farm, still more distant and harder to make out than Frenk's. This belonged to Hork IV, Chair of Parz City, Dura was told. The absent-minded Chair escaped his civic responsibilities — leaving Parz in the scheming hands of his son — by indulging in elaborate agricultural experiments, here at the Crust. On Hork's ceiling-farm there were said to be spears of wheat taller than a man, and Crust-trees no longer than a man's arm and bound up with lengths of Corestuff-wire...