Slag and Cinder

Molten bronze smells like lightning before it strikes. If the zinc boils off too fast, the metal turns brittle, and a six-ton naval gun becomes nothing more than expensive shrapnel waiting for a match.

I need this pour to look flawless.

"Rake it, Shaphil," I say over the roar of the pit. "Dross is floating left. Don't let it touch the gate."

Shaphil jams his long iron skimming rod into the trench. White-hot scum curls off the surface like burning oil. Sparks pepper his leather apron, biting through the seams. He doesn't flinch.

"If this batch blows," Shaphil shouts back, his soot-streaked face gleaming orange in the glare, "do you think the church gives us a church burial, or do they just shovel us into the masonry?"

"Neither. They deduct the iron rod from our wages."

I don't look up from the runnel. The metal rushes down the sand-packed trench toward the sunken pit. Beneath the floorboards rests the mold for the High Patriarch's newest culverin, thirty spans of packed clay and horsehair binder. In the belly of the core, hidden beneath three layers of tallow, lies my private heresy: a hairline grain of saltpeter and sulfur, tuned to sing when the church broadside fires.

One shot will hold. The second will tear the breech apart.

"Clear the gate," I tell him.

I plunge my own bar into the stream, catching the crust just as the color shifts from cherry to blinding straw. The vibration travels up the iron into my forearms, a sharp, ringing hum that vibrates in my teeth. The bronze is alive. It resists the clay, thick and heavy, until I whisper the third verse under my breath, my voice buried in the furnace clatter. The molten tide smooths instantly, slipping into the core like tallow into a wound.

"Clean," Shaphil mutters, exhaling a cloud of gray ash. "Tamarath, you're a witch. That gate should have choked five seconds ago."

"Shut up and dump the sand cover."

The double iron doors of the casting hall slam open.

The sound hits like a hammer on an anvil, loud enough to cut through the bellowing draft of four blast furnaces.

Ten church musketeers file through the archway. Their iron greaves ring against the flagstones, precise and unbroken. Black wool cloaks, stiff collars, and matchlocks resting across their chests with smoldering cords already wound between their fingers. They don't take positions by the hearths. They fan out along the perimeter, cutting off the coal ramp, the water cisterns, and the south wagon exit.

Behind them walks Kelalim.

Everyone in Hazor-Mor knows the Provost Marshal. You hear his name in tavern brawls right before someone gets dragged into the harbor fog. He wears no armor, only a fitted coat of charcoal wool with silver buttons running to his throat. A heavy dueling pistol sits holstered against his ribs. His white leather gloves are spotless, an insult to every man who eats coal dust for a living.

The casting hall goes dead. Even the bellows tenders freeze, their chains swinging in shallow arcs.

"Nobody drops a tool," I say under my breath. "Keep the sand moving, Shaphil."

Shaphil's shovel trembles against the rim of the sand trough. "Tamarath. He brought ten."

"I can count."

Kelalim stops six paces from our pit. His gray gaze sweeps over the cooling trench, the glowing slag basins, and the apprentices huddled against the brick partitions. He smells like cold cedar and burnt tallow. It cuts right through the sulfur stench of the furnaces.

My throat tightens. My pulse kicks hard against my ribs.

I hate how clean he looks.

"Master Founder Tamarath," Kelalim says. His voice is smooth, quiet, and carried on an easy cadence that belongs in a cathedral nave, not a soot pit. "You are running behind schedule."

I plant my skimming rod into the dry sand bucket by my hip. Heat bleeds off my leather sleeves, baking my skin.

"The alloy takes the time it takes, Provost," I answer, wiping a streak of black grease across my forehead with the back of my wrist. "Rush the cooling, and the Patriarch gets twelve thousand pounds of cracked bronze in his drydock."

Kelalim tilts his head. He doesn't raise his voice. He doesn't frown. He simply looks at me, his eyes measuring the distance between my soot-covered knuckles and the iron rod.

"The Patriarch requires twelve guns for the southern fleet by the autumn equinox," he says. "Two foundries in the Lower Basin have already failed their quotas. Their masters were shot against the sea wall at sunrise."

A cold drop of sweat runs down the back of my neck.

"Then they didn't know how to temper their tin," I say. "My guns don't crack on the bench."

"No," Kelalim murmurs, taking two measured steps closer. The distance between us shrinks to three paces. "Your guns are remarkably durable. Until they meet salt water."

My jaw aches with the effort not to look toward the trench. Did an apprentice talk? Did someone notice the grain pattern on the test sleeves from last month?

"Bronze hates salt," I say, keeping my voice flat. "Any apprentice knows that."

"Apprentices know what they are told," Kelalim says. He steps past me, ignoring the heat radiating off the pit. His polished black boots stop right at the edge of the cooling trench.

He looks down into the molten runnel.

The slag crust is forming, a dull gray skin settling over the liquid core. Beneath that crust, the heretical seam is drinking heat, annealing into the metal.

"This yard is now under inquisitorial oversight," Kelalim says, turning his back to the furnace. "My men will garrison the upper gantries. Every ingot of copper, every cask of tin, and every grain of sand will be weighed under my seal. No one leaves before the evening bells without my signature."

"You'll choke the draft," I say. "Soldiers track grease into the sand molds. One drop of oil in a hot mold causes an explosion."

"Then do not let them drop oil, Tamarath."

He uses my name without a title this time. It rolls off his tongue like a sentence passed down from the high pulpit.

Kelalim steps toward the barrel mold. The bronze housing is still radiating a blistering halo of orange heat, hot enough to singe dry wool from two feet away. He doesn't flinch from the temperature. He reaches out a gloved hand and places his palm directly against the upper rim of the cooling collar.

Leather smolders against the bronze. White smoke curls from the tip of his glove.

He closes his eyes for two seconds, his fingers splayed across the seam. Right where the sulfur line rests underneath.

My breath catches in my chest.

"An interesting temper," Kelalim says softly, opening his eyes to fix them on mine. "It rings before it cools."

He peels his charred glove from the bronze, leaving a black brand on the pristine white leather. He looks at the burned skin of the glove, then drops his hand to his side.

"Cast the next sleeve by tomorrow noon," he says. "I will be watching the pour myself."

He turns on his heel and signals his squad. The musketeers spread out along the gantry stairs, their boots ringing on the iron gratings above our heads.

Shaphil lets out a long, ragged exhale beside me. "We're dead. We are entirely, thoroughly dead."

I pick up my shovel and scoop a heavy mound of black sand over the smoldering seam.

"Not yet," I tell him. "Keep working."