…the wooden scraps were produced by his hobby, which was constructing one-in-one-twenty-eighth scale models of ancient sailing ships.

He had drained the swimming pool in his quarters and turned it into a miniature forestry plantation and farm using some of the biomass the Mind and he had been provided with; tiny trees grew there which he cut down and sliced into little planks and turned on lathes to produce all the masts, spars, decks and other wooden parts the sea ships required. Other bonsai plants in the forest provided long fibres which he teased and twisted and coiled into thread- and string-thin ropes to make halyards and sheets. Different plants let him create still thinner fibres which he wove into sails on infinitesimal looms he had also constructed himself. The iron and steel parts were made from material scraped from the iron walls of Pittance itself. He smelted the metal in a miniature furnace to rid it of the last traces of impurities and either flattened it in a tiny hand-turned rolling mill, cast it using wax and talc-like fines, or turned it on microscopic lathes. Another furnace fused sand – taken from the beach which had been part of the swimming pool – to make wafer-thin sheets of glass for portholes and skylights. Yet more of the life-support system’s biomass was used to produce pitch and oils, which caulked the hull and greased the little winches, derricks and other pieces of machinery.

It had taken him ten years to make the tiny machines to make the ships, and then making each ship occupied another twenty years of his time. He had constructed six vessels so far, each slightly larger and better made than the one before. He had almost completed a seventh, with just the sails to finish and sew; the scraps of wood he was burning were the last of its off-cuts and compacted sawdust.

Iain Banks, Excession