In the Lower Quays the mornings came like a careful promise, made of brass and soot and the thin blue smoke of water heaters. Roof tarps stitched into patches, chimneys like teeth, and alleyways where steam pooled in the hollows before it rose again in slow, eager tongues. Evelyn Vara kept a small shop wedged between a dyehouse and a stall that sold boiled reeds for respirators. The shop smelled of spindle oil and warm metal, the scent of things that had been coaxed back to motion. Her bench was dense with tools: files with handles worn smooth, a collection of tiny screwdrivers nested in a piece of leather, a jeweler's loupe set at a permanent angle. Her hands, the color of copper, moved with a calm that had the look of someone who had practiced saving time by making time hold its breath. On the wall there were small finished pieces hung like medals, a set of watchfaces she had ground-perfect for a tradesman and a delicate respirator plate polished until it caught the light of the streetlamps.
She tended her aunt's respirator in the mornings, tightening springs and changing the little bellows membrane that made the machine breathe with a measured sigh. The aunt kept her world to the alcove where the sun warmed the wall, wrapped in a patchwork shawl, and sent with Evelyn a catalogue of small kindnesses to teach the hours to pass. Evelyn thought of breath as currency, a thing traded in small increments by everyone on the Quays. A coughing child could bankrupt a family in a week. A regulator failure could bankrupt a neighborhood in an hour. People in the Quays had learned to count breaths the way sailors counted knots; many of them carried small counters or little vials of saline tucked against their ribs.
Above the layered roofs the city wore its dome like a polished hat. A lattice of pipes and glass and riveted plates kept whole districts sealed from the fattest smoke and the heaviest ash. The Night Engine lived at the dome's heart, far from eyes and nearer to the city's ribs, and people spoke of it in the low, ritualized voice of those who must believe in something bigger than their good habits. The hum of its gears was not always music; sometimes it sounded like a strained wire that refused to be tuned. Evelyn had grown up to that sound. It had been the lullaby and the warning of her childhood, and when the hum took the particular, thin pitch it wore that week, she felt the hair on the back of her neck lift in anticipation.