"Behind her, for a moment, the sky was very full: an aerostat droned in the distance; tiny specks lurched erratically around it, winged figures playing in its wake like dolphins round a whale; and in front of them all another train, heading into the city this time, heading for the centre of New Crobuzon, the knot of architectural tissue where the fibres of the city congealed, where the skyrails of the militia radiated out from the Spike like a web and the five great trainlines of the city met, converging on the great variegated fortress of dark brick and scrubbed concrete and wood and steel and stone, the edifice that yawned hugely at the city’s vulgar heart, Perdido Street Station."