THE CHAMBER WHERE THEY WERE TO board the Bell was at the very base of the City. The chamber had walls, an upper surface — but no floor. Farr, following Hosch and Bzya, clung to guide ropes and gazed down into clear Air, drinking in its freshness after days of the stale stenches of the Harbor. He was aware of the immense mass of the City above him; it creaked softly, like some brooding animal.

The Bell itself was a sphere of hardened, battered wood two mansheights across. Hoops of Corestuff were wrapped around it. The Bell was suspended from an immense pulley which was almost lost in the darkness above Farr's head. More cables attached the Bell loosely to the Spine. Farr could make out pale patches in the dimness above, faces of Harbor workers close to the pulley.

The Spine was a pillar of wood which plunged, trailing cables, out of this chamber and speared through the thick Air beneath the City. It turned into a dark line, barely visible, curving slowly to follow the flux of the Magfield. Cables trailed along its length to reach far, far down, into the distant, bruised-purple, lethal mass of the underMantle.

Farr, following the Spine's curve, felt his heart slow inside him.

The Bell seemed impossibly fragile. How could it possibly protect him from dissolution in the depths of the underMantle, hovering over the boiling surface of the Quantum Sea itself? Surely it would be crushed like a leaf; no wonder so many Fishermen lost their lives.

Hosch opened up a large door in the side of the Bell and clambered stiffly inside. Bzya prodded Farr forward. As he approached the sphere Farr saw how badly scuffed and scratched the outer surface was. He ran a finger along one deep scar; it looked as if some animal had attacked this fragile-looking device, gouging it with teeth or nails.

Reassuring, he thought drily.

Farr had expected the interior of the Bell to be something like Mixxax's car, with its comfortable seats and light-admitting windows. Instead he entered a pocket of gloom — in fact he almost collided with Hosch. The only windows were small panels of clearwood which hardly admitted any light; woodlamps gave off a smoky, apologetic green glow. There was a pole running the length of the sphere's axis, and Farr clung to this. There was a small control panel — with two worn-looking switches and a lever — and the hull was bulky with lockers and what looked like tanks of Air.

Bzya lumbered into the Bell. The interior was suddenly crowded; and as the Fisherman's huge hands wrapped around the support pole the Bell was filled with Bzya's strong, homely stench. Hosch clambered around them both to pull closed the hatch — a massive disc of wood which fitted snugly into its frame.