The morning after the refectory meal, the rain turned to a thick, yellow fog that rolled off the marsh and settled into the lower tier. It didn't lift. It stayed in the corridors, turning the lime-washed stone into a slick, weeping mess that smelled of wet slate and old tallow.
James didn't look at the fog. He sat on his mattress, his back pressed into the angle where the timber frame met the wall.
His head was clear today—not because the ninety-hertz hum had stopped, but because he had finally figured out how to push the sound into the lower part of his jaw. It made his molars ache with a dull, metallic coldness, but his eyes had stopped watering. He could look at the partition wall without seeing the secondary iron joists pulsing through the plaster.
"The register is late," Drake said. He was sitting on the floor by the door, his right knee pulled up to chin-level. His vanguard shoulder—the left one, where the jagged ring of translucent salt still sat beneath the skin—was stiff from the morning damp. Every time he tried to rotate his elbow, the blue-green light beneath the scar-tissue flickered, a faint, sickly glow that made the wool of his shirt look thin. "They usually drop the tool-manifest by eight."
"They're re-indexing," James said simply. "The system language is changing."
"They can change the names all they want," Drake growled, his hand tightening into a knot over his shin. "They still have to haul the coal. The forge doesn't run on ink."
A sharp, double-tap hit the iron panel of the door.
It wasn't the heavy clonk of Miller's cane. It was the quick, nervous rattle of a junior clerk's knuckles. The delivery slot at the bottom of the frame swung inward by three inches, and a flat, tin clipboard slid across the stone flags, stopping when it hit Drake's heel.
The clerk's face didn't appear in the gap. The slot slammed shut immediately, the lock engaging with a dry, mechanical click.
Drake picked up the tin. It was an ordinary inventory sheet—the kind the lower-tier logistics students used to track the grease-buckets and the hemp rope for the lift-wagons. The paper was coarse, yellowed at the margins, and smelled faintly of wood-vinegar.
"It's the tool manifest for Ward 4," Drake muttered, his eyes squinting at the ink. "Three blankets. Two plates. One iron spoon, reclassified as lost." He paused, his thumb rubbing against the bottom of the tin frame. "James. Look at the margin."
James slid off the bed, his boots silent. He didn't use his grey eye. He used his left, normal eye, leaning down over Drake's shoulder.
At the very bottom of the ledger page, under the official purple stamp of the Auditor's Office, someone had used a dry iron stylus to scratch a line of text directly into the paper. There was no ink in the words—just the deep, sharp grooves where the metal point had plowed through the wood-pulp. It was Xander's hand. Short, jagged, and missing the vowels to save space.
K-R F-R-G-E M-I-D-N-T C-A-L-D-E-R S-I-G-N
Drake's breath hitched, the wet rattle in his lungs catching. "Calder signed. They're moving her to the forge cells tonight. Midnight."
"They're doing it during the shift-change," James said. His voice was level, but his fingers tightened against his trousers until the jute twine on his laces creaked. "When the secondary guards are clearing the lime-pits."
"We can't break the door, James," Drake whispered, his right hand going instinctively to his ruined shoulder, his fingers digging into the salt-scar until the blue-green light went dim. "If I had the tower shield... if I could anchor into the frame, I could take the lock off the masonry. But without the brace holding... I can't even lift the iron bar. The mass isn't there."
"We don't break the door," James said. He reached down, his right hand—the one permanently fused to the cold, tungsten remnants of the core cage—lifting the tin clipboard from Drake's lap.
He didn't just look at the scratches. He turned the tin over, his thumb tracking the side where the metal sheet was crimped around the backing board. There, hidden in the shadow of the seam, three tiny, microscopic air-needle punctures had been driven through the solder.
It wasn't a magic key. It was a rhythmic template—a physical record of the internal frequency Xander had observed in the logistics cellar locks before his pads were charred. He had left them a map of the internal mechanism's drift.
"He didn't solve the lock for us," James said, his finger resting on the cold metal punctures. "He just found where the gears are loose. We still have to match the vibration ourselves."
Drake looked up, his brow furrowing. "With your hand? James, if you pulse the full spectrum in this corridor, the central dampener will flag the variance before we clear the turnstile."
"Then I don't pulse," James said. He looked down at his boots, at the grey dirt still clinging to the leather. "I use the rest note. We make the lock think the room is empty."
He didn't feel like a hero with a plan. He felt like a boy trying to find a loose brick in a wall that was slowly closing in on them. They had a time, and they had a loose seam in the ledger.
But as James tucked the tin sheet under his mattress, the ninety-hertz hum in the floorboards seemed to grow slightly heavier, a reminder that every small choice they made left a footprint in the dust.