On the far side of the town was a floating dock, anchored to a concrete pillar sticking out of the surf. “This is the old ferry dock. They cut off one section and floated it, and now they’ve pumped out the ferry offices down below and reoccupied them.”

“Reoccupied them?”

“You’ll see.”

Bly hopped from the rocking gunwale to the dock, and held out a hand to help Nirgal across; nevertheless Nirgal crashed to one knee when he hit.

“Come on, Spiderman. Down we go.”

The concrete pillar anchoring the dock stood chest-high; it turned out to be hollow, and a metal ladder had been bolted down its inner side. Electric bulbs hung from sockets on a rubber-coated wire, twisted around one post of the ladder. The concrete cylinder ended some three meters down, but the ladder continued, down into a big chamber, warm, humid, fishy, and humming with the noise of several generators in another room or building. The building’s walls, the floor, the ceilings and windows were all covered by what appeared to be a sheet of clear plastic. They were inside a bubble of some kind of clear material; outside the windows was water, murky and brown, bubbling like dishwater in a sink.

Nirgal’s face no doubt revealed his surprise; Bly, smiling briefly at the sight, said, “It was a good strong building. The what-you-might-call sheetrock is something like the tent fabrics you use on Mars, only it hardens. People have been reoccupying quite a few buildings like this, if they’re the right size and depth. Set a tube and poof, it’s like blowing glass. So a lot of Sheerness folk are moving back out here, and sailing off the dock or off their roof. Tide people we call them. They figure it’s better than begging for charity in England, eh?”

“What do they do for work?”

“Fish, like they always have. And salvage. Eh Karna! Here’s my Martian, say hello. He’s short where he comes from, eh? Call him Spiderman.”

“But it’s Nirgal, innit? I’ll be fucked if I call Nirgal Spiderman when I got him visiting in me home.” And the man, black-haired and dark-skinned, an “Asian” in appearance if not accent, shook Nirgal’s right hand gently.

The room was brightly lit by a pair of giant spotlights pointed at the ceiling. The shiny floor was crowded: tables, benches, machinery in all stages of assembly: boat engines, pumps, generators, reels, things Nirgal didn’t recognize. The working generators were down a hall, though they didn’t seem any quieter for that. Nirgal went to one wall to inspect the bubble material. It was only a few molecules thick, Bly’s friends told him, and yet would hold thousands of pounds of pressure. Nirgal thought of each pound as a blow with a fist, thousands all at once. “These bubbles will be here when the concrete’s worn away.”