The Lantern That Hummed

The city wore its morning like a damp coat. Steam hissed from grates, beading along brass railings and catching the gaslight in weak halos. Tamsin Reed stood under the crooked sign of Reed & Wild Repairs and turned a key in a hissy boiler that had opinions. The boiler spat, clanged, and finally settled. She exhaled and wiped a thin line of oil from her cheek with the back of her glove. Somewhere beyond the market roofs an airship horn moaned, low and slow, like a whale calling from fog.

Her shop smelled of tin, coal soap, and tea leaves that someone had spilled into a drawer of springs. Gearboxes lay open on velvet. A clockwork squirrel, patched and proud, tested its little jaw on a nut made of copper. It clicked with satisfaction and wagged a wire tail.

“Careful, Pip,” Tamsin said. The squirrel froze, ears held high from tiny coils. “No more of Marta’s buttons.”

She stepped outside to the Clockmarket. Vendors rolled carts under the vaulted ironwork. Pigeons strutted with rivets stuck to their claws. Marta, the pastry-seller, slid a tray of apple turnovers into a heated cupboard built from an old smoke engine. The cupboards hissed when she swore.

“Morning, Tam,” Marta called, attempting cheer that the fog ate. “Tell your little terrier to stop stealing my string.”

“He’s a squirrel, not a terrier,” Tamsin said. “And also, a gentleman.”

“Gentlemen pay for their breakfast,” Marta replied, but she pushed a warm turnover across the counter with two fingers stained with cinnamon. “You look thin, love. Working nights again?”

“Five boilers in three days,” Tamsin said through a bite. The pastry flaked, sweet against the metallic air. “Everything’s overworked. Feels like the whole city’s running too hot.”

“Always has,” Marta muttered. She leaned over her cupboards to warm her hands. Down the lane, a steam omnibus rattled past with a sign for the Aether Board: INSPECTORS AT RANDOM. KEEP YOUR PAPERS. Behind it, a pair of enforcers in blue enamel breastplates moved at a patrol pace, their boots clanking in measured time.

Tamsin turned the turnover in her hand to hide it. The enforcers’ shadows slid over brass lampposts. Their faces were blank as shovels. She caught sight of the tower that held the heart-engine gauge. The red needle ticked lazily. It should have been higher.

A courier tube snickered and coughed beside her door. A brass pod thudded into the cage, wobbling. Tamsin set the turnover down, felt for the latch, and drew the pod free. The seal was an old sigil, ringed with soot, marked with a little owl’s head. Her chest tightened. She knew that mark.

Professor Loxley had signed his notes that way, when she’d been his apprentice in a different life and less fog. The edges of the brass were warm as if it had ridden far, fast. She broke the seal with her thumbnail and lifted out a folded strip of vellum and a small, odd gear cut with twelve notches.

Her name sat alone on the vellum: Tamsin. Below it, written in quick strokes that made her feel sixteen again, the message: If the heart falters, find the lantern under Dock Number Seven. Trust no Board men. The gear will fit. — L.

She turned the gear over in her palms. It had a dull shine, like something made before the city used polish and slogans. She could feel the weight of all the little decisions that would trail after folding this vellum, putting it in a pocket, ignoring it. She slid the note into her vest.

“Trouble?” Marta asked. She had seen a hundred secrets pass across this lane and asked that same question each time.

“Only work.” Tamsin smiled in a way that did not convince either of them. “How’s your niece?”

“Better,” Marta said. “They’ve moved her bed closer to the orphanage pump room. It’s warmer there.”

A gust of steam drifted down, smelling of damp brick and alkaline soap. The needle on the heart-engine’s distant gauge hesitated. Tamsin felt it more than saw it. A humming in the bones. The market fell quiet as if something living had paused mid-breath.

Then a siren wailed high. The sound scraped at windows, shook droplets from eaves. People looked up. The enforcers did too, before schooling their faces back to metal.

“Brownout,” someone said. “Again?”

A row of gaslights along Gear Street guttered, fought, and dimmed to a thready orange. The pastry cupboards complained and clicked down to save fuel. Tamsin dropped the half-eaten turnover into a napkin and shoved it into her pocket, as if a warm thing could keep her from thinking cold thoughts.

Dock Number Seven lay in the fog-belly of the city, where ships came to sleep and rats ran schools in the gutters. It had been sealed since a collapse last winter that chewed a funnel crane in half and sent rivets like hail.

“Tamsin?” Marta said softly. “Don’t.”

Tamsin looked at her, at the enforcers receding, at the needle’s stubborn slouch. Loxley had left a word and a gear. He would never have done that if it weren’t necessary. He’d never done anything without necessity. Not when he’d sent her away from the Guild. Not when he had kept certain techniques to himself with a shrug as flat as paper.

“Could be a trick.” Marta was guessing at shadows because Tamsin’s face gave them away.

“Could be the truth,” Tamsin said. “If the heart stops, the ovens stop, the pumps stop. Everything cold in a night. The little ones at the orphanage...” Her voice lodged. She pressed a knuckle under her eye and pretended it was a piece of soot.

Marta nodded once. “You’ll need a proper lamp.” She fetched a battered case from under her stall, brass corners polished by use. “Brighter than anything in your shop. Don’t say where you got it.”