He is a star, Swamp-Taught Low. Another is Lothaniel Durayne, a professor of somaturgy who fights his feline tar-golems as Loth the Catman. They relish these stage names. There is the Dandler, a quiet woman Pennyhaugh says is likely a militia scientist. She gives her golemachs whipping chain tails. This troika exchange the top rank between them, but Judah keeps it most.

The stronger the somaturge, the greater the mass they can control. Soon they are setting upper limits to weight. Nothing heavier than a large dog can fight. Judah wonders how much he could control if he chose.

As organisers, bookie and top golemachist, Pennyhaugh and Judah amass good money. Golem wrestling is noticed by New Crobuzon’s press, and there are many newcomers. Judah is growing bored. He only fights Loth and the Dandler now. He watches how they animate their constructions. He listens to their hexes. He fights enough to make money, but mostly he fights to learn.

Every time his golems move, Judah feels his connection to the stiltspear. -I want to know everything about this, Judah says. Pennyhaugh brings him to the university library, and shows him relevant texts. He reads the titles: Theories of Somaturgy, The Limits of Plasmic Range, Beyond the Abvital Debate. - I want to know everything, he says.

It is a sweet winter. Judah takes Ann-Hari ice-skating. She likes the way he is recognised by some they pass. -Swamp-Taught! one says. It makes Judah less happy.

They walk in the frost-glazed shopping streets of The Crow, which are strung with ropes of lights and winter flowers. They drink hot chocolate mulled with rum. Ann-Hari is not looking at him. Her eyes pass over his and she smiles, and it is a real smile, but she is not looking at him.

Good-bye, Judah thinks, and smiles back.

When snow comes, for a few hours it effaces all the edges of architecture: the tight-coiled cornices of old churches, dark stone buttresses and all the countless poured and moulded concrete and brick terraces, and workers’ cottages too mean or crude to have any style at all. They become undulations below snow; then they are themselves again, as they sweat off sleet.

Judah dresses in the exaggerated clobber of a street-success. When he walks, the Dog Fenn children run after him, with a few skinny cactus youths and leaping vodyanoi, and beg him to make golemachs for them. Sometimes he animates a squeezed-together handful of coins and lets it totter toward them, for them to watch and pick apart.

Ann-Hari has no interest in learning to read, but when she discovers that he plumbs the newspapers for the progress of the Transcontinental Railroad Trust, she demands Judah read to her every day she is with him (there are more and more days that she does not come home).