The last pick came out of the quench trough while the dawn horn was still sounding.
Lu Chen held it over the draining rack. Oil ran from the black head onto his boots. His hands had stopped obeying him cleanly; when he loosened the tongs, the jaws opened too far and the pick struck the others. Master Yan caught the slipping shaft with his good arm.
“Away from the edge.”
Lu Chen moved the rack. That simple effort made his knees shake. Across the hearth, Liu San had folded over the bellows handle without releasing it. Hu Gou slept against a sack of ash. Nobody spoke about the corpse hounds. The scorched patch beside the trough was enough.
Yan checked the finished tools, then dragged the leather curtain across the doorway. “Sleep until the meal horn. If you fall into my fire, I won't waste a hook pulling you out.”
Lu Chen lay behind the flue. Beneath his cheek, the hearthstone remained warm. He could hear Yan walking through the forge, counting the stock again. Each scrape of a boot brought back the sound of Gao's chain. The hound had almost found the hidden stones. A different gust, another step, and it would have.
He shut his eyes. The next thing he knew, someone was striking a wooden bowl against the curtain pole.
The meal had begun.
He ate standing near the doorway, forcing the coarse mash down before it cooled. At the serving bench the other apprentices left a gap around him. A man who had shared the line with him yesterday moved his bowl when Lu Chen's sleeve brushed the wood. Lu Chen saw it and kept eating. Asking why would only give the man an excuse to hit him.
He saved a portion in a clean scrap of cloth. It would not last long, but the map did not show kitchens outside the valley.
Returning to the flue, he waited until Yan began grinding roots. Then he lifted the loose hearthstone and drew out the lamb-bladder wrapping. Two azure stones pressed against his fingers. The first of the three from the buried altar had already crumbled during his earlier cultivation. These two still carried enough stored breath to make the hairs along his wrist stir.
The patrol token lay beside them. Zhao's iron mark was greasy from being handled. Lu Chen wiped it with his sleeve and turned it face down.
He bound the stones separately beneath his vest, cushioning them with folded linen. The token went lower, where it could not knock against the flask of Ghost-Fire Vitriol. He tucked the scraped hide chart against his belly and bent forward. A stone dug into his ribs. He untied that binding, moved it, and tried again.
He had hidden things beneath a cage while Sergeant Tie searched him. Carrying them through a tunnel would be different. A loose knot could leave a stone in poisoned water, and he would never find it.
The nine needles remained in their sleeve sheaths. He checked each wire without drawing the sharp ends. One snag caught against the inner seam; he freed it with the blunt scraper from his apprentice pouch. The bone spoon and the remaining dry root shavings stayed in that pouch. He could carry those openly. The shadow-steel sharpening stone was still in the old sleeping recess, and he did not go back for it. That door had already been broken once.
Yan stopped grinding.
Lu Chen let his shirt fall over the bindings. The old man looked at the empty mortar in front of him, then at the boy's untouched pestle.
“You waiting for the roots to crush themselves?”
Lu Chen took the pestle. His wrists ached before the first handful was finished. He worked anyway. The smell of camphor covered the sharper trace escaping around the flask's stopper. Behind him, Liu San limped between the bellows and the fuel bin. Whenever Lu Chen turned, the older apprentice found another place to look.
By evening, the forge's work had settled into smaller tasks: cleaning the trough, sorting usable charcoal, carrying empty jars back to the shelf. Lu Chen took the waste basket outside and watched the lower yard from the ash heap.
Two sentries stood at the hoist entrance. One watched the road; the other checked the slate that arrived with each load. They changed places after a fuel cart passed. Lu Chen had used this hoist before, and he knew where the gate scraped, where the winchman kept his tally, and how long he looked away when the cage settled.
The returned wash jars arrived while he watched. A porter set them beside the hoist, checked the carrying thong, and passed the empty cord back to the forge runner. Lu Chen watched where those jars were taken. They gave him something real to bring up if he survived the descent. He would not have to return empty-handed and explain a whole watch spent doing nothing. An unused carrying thong waited on the forge's jar rack. He could fit it to the medicine bucket when he returned, then detach it if he needed both hands below.
He stayed until his basket attracted notice.
“Move that muck,” a guard called.
Lu Chen lifted it and returned to the forge. He fitted the carrying thong to the medicine bucket and put it aside. He had learned enough to choose the next change of watch. He had not learned enough to make the men disappear.
Night brought a harder wind. Yan's shoulder seized while he was putting away a jar, and he ordered Lu Chen to shut the outer draft curtain. Liu San took the last fuel load to the hearth. When the older apprentice bent, his wounded knee failed and the basket spilled. He cursed through his teeth, then went quiet when he saw Lu Chen watching.
Lu Chen helped gather the fuel. He needed Liu working, not making enough noise to summon someone from the yard. Liu kept his face turned aside as their hands reached into the same heap.
Later, the forge slept in patches. Yan sat against the wall with his bad arm across his stomach. Lu Chen lay still until the lower-yard footsteps changed. Then he rose, took an ordinary work lamp from its hook, and slipped out carrying an empty medicine bucket.
The hoist sentry caught him before he reached the gate.
“Where?”
“Fifth drift. Runoff jars.”
The man held out his hand for a slate.
Lu Chen's stomach tightened. He had hoped the bucket would be enough. Instead, he reached beneath his vest and brought out Zhao's token. The iron had warmed against his body. He kept its marked face toward the lamp.
The sentry examined it, then looked at Lu Chen's narrow shoulders.
“Who sent you?”
“The forge.”
“That's a place, boy.”
Lu Chen swallowed. “Master Yan. The lower wash is backing up.”
The guard glanced at the winchman. That man had been on duty when the last dirty jars came up from the lower workings. He shrugged without leaving his stool.
“If he breaks one, it isn't my load.”
The sentry returned the token. “Bring the lamp back. And don't foul the cage.”
Lu Chen stepped inside before the man could decide to look through his bucket. The gate closed against his back. As the hoist descended, the token slipped in his damp hand. He caught it against the bucket rim and held it there until he could put it away.
Below, the cage lamps lit the first stretch of the drift. Further in, the old blast damage remained: splintered props, blackened stone, piles of shale shoved clear of the cart road. Lu Chen followed the turns he remembered from carrying ore. He did not open the chart until he had passed the last occupied work bay.
Zhao's marks were rough. A black cut crossed the main road; beside it, a drainage sign had been scraped almost through the hide. Lu Chen counted the abandoned wall hooks, found the low opening beyond them, and knelt to listen.
Water moved inside the mountain. It dragged grit against stone with a dull, steady rasp.
He set down the bucket. If someone found it, they would know an apprentice had come this way. Taking it further would leave him with one less hand. He put it behind a broken prop where it could not roll into the road, then crawled beneath the low arch.
The siphon opened beyond it. His lamp showed a vaulted roof, a dark run of water, and the first iron grate. The bars were planted into the walls. Corrosion had swollen around their footings, but the frame did not move when he pushed it.
He tried the latch with his scraper. Rust flaked onto his thumb. Underneath, the old iron remained firm.
The flask was difficult to open. He wrapped the lead stopper in the hem of his shirt and turned until it loosened. A harsh mineral smell filled the vault. His eyes watered. He waited for his coughing to stop before lifting the flask again.
At the forge he had watched a stray drop hollow out scrap iron. Here he needed to reach the same vulnerable metal without wasting the contents on bare rock. He scraped the outer crust from the upper footing, laid an oily waste rag beneath it, and tilted the flask.
The first pour missed. Vitriol ran along the frame and smoked against the rag.
Lu Chen jerked his hand back. He wanted to curse, to pour more and finish before anyone came. Instead he closed the flask and pressed his forehead against his sleeve until he could hold it steadily.
He had seven grates to pass.
The next pour reached the exposed joint. Dark paste began sliding from the iron. He watched it change, then used the scraper to clear the softened outer layer. Fresh metal lay underneath. Too much. He could not afford to bathe the whole frame.
He moved the lamp closer and found the pin passing through the iron ear. The chart showed hinges, not a solid portcullis. He worked at the pin rather than the bar, catching the runoff where he could. Once the upper fastening softened, he treated the lower one. The waiting between them was worse than the work. Every sound from the drift seemed to be a boot approaching.
When he pulled the frame, it shifted and stopped. Lu Chen froze. The bottom edge had caught on the stone sill. Forcing it would scrape iron through the vault.
He placed folded rag beneath the edge and used the scraper as a lever. The handle bent slightly. The frame lifted, settled onto the cloth, and moved with a low grinding sound that he could feel through his knees. He held it there, listening.
No answering shout came.
He eased the grate far enough to turn sideways. The flask went inside his vest before he attempted the opening. He had nearly forgotten it on the sill.
His coat caught on a jagged patch. Lu Chen backed up, freed the cloth by hand, and tried again. This time he passed into the siphon, drawing the lamp after him. The air beyond the iron felt colder and much wetter. His boots pressed into slime covering the narrow bank.
He turned to leave the frame standing near its old position. The weakened ear crumbled beneath his fingers. He set it down carefully and stopped pretending that this would remain invisible forever. It only had to escape notice until he returned.
A wet scraping came from overhead.
Lu Chen raised the lamp. Pale bodies clung where the roof met a quartz seam. The nearest had no visible eyes. Its head unfolded around a set of hooked mouthparts, and a strand of cloudy saliva stretched down toward the flame.
Another body detached behind it.
Lu Chen pulled his right sleeve clear. The first needle slid against his palm while the lamp shook in his other hand. He backed toward the grate, trying to keep both creatures in view. The bank ended under his heel. Water struck his boot.
He could not retreat another step. He lowered the lamp toward the open water and watched the pale heads turn after it.