Lin Xiao felt them coming before he heard them, two heartbeats through the stone, under his palm.
He'd been sitting with Ku in the sweeping corridor, sharing the last of Qingyao's salt pork, Ku had accepted his portion with the grave courtesy of a man receiving tribute, when the echo came: thud-thud... thud-thud, two rhythms, one light and quick, one heavy and armored.
"Two," Lin Xiao said quietly. "Her, and someone else. Heavy. A guard."
Ku didn't stop sweeping. The same slab, the same ash, Lin Xiao watched, suddenly seeing it the way he'd seen the backward stroke in Fang Che's trap. Nine hundred years of sweeping, and the ash on that slab never moved. It lay in exactly the same drifts, the same whorls, as if the broom passed through it rather than pushing it. As if Ku weren't sweeping dust away, but sweeping something in, keeping a pattern intact.
"Ku," Lin Xiao said slowly. "What are you sweeping?"
The broom didn't pause. "The floor, boy."
"For nine hundred years? The same slab?"
"Some floors," said Ku, "need more sweeping than others." He looked up, and his grey eyes were serious. "Worry about your own patch. The heartbeats are getting closer."
Lin Xiao pressed his palm to the stone again. The light rhythm was Qingyao's, he knew her tread now the way he knew his own pulse. The heavy one: the guard captain, Fang Che's scarred jaw, in half-plate.
She was followed after all, he thought. The note warned me. I should have moved faster.
No time for regret. He was on his feet, ward-stone in his sleeve, mind racing the way Chen had trained it to race: assess, adapt, act.
"Ku," he said quickly, "the Silent Gallery, the collapsed section. How bad is the ceiling?"
"Bad." The old man understood immediately. "The smoke weakened the east lintel. Why?"
"Because I'm going to drop it. Onto no one, near someone." Lin Xiao's mind was already three moves ahead. "The captain follows sound. I'll give him sound, the whole gallery, singing. He'll chase it under the lintel. I'll bring the lintel down behind him. Sealed, not crushed. He digs out in a day."
"And the girl?"
"I get her out through the servant seam. She walks back into the light scared, which she will be, because it's true." Lin Xiao checked his breath-ward. "And Ku, the talisman in her sleeve hears everything. So I give it something worth hearing."
Ku studied him for a long moment. Then the old man smiled, the real smile, the rare one, the one that made him look nine hundred years younger.
"Your master," Ku said, "would have hated that plan. Too clever by half." He picked up his broom. "He'd have loved watching it work. Go on, boy. And Lin Xiao-"
"What?"
Stolen novel; please report.
"Hum quietly."
Option one: run. Take the servant passages, vanish deep. But the talisman in Qingyao's sleeve would record his absence, Fang Che would know the ghost had been here, had fled from her. That would paint her as bait that worked.
Option two: fight the captain. Stupid. The man was a trained soldier in half-plate, and Lin Xiao had a stick and three completed principles.
Option three -
Lin Xiao smiled in the dark. Feed the talisman.
"The Silent Gallery," he told Ku. "I'm going to give that talisman something to hear."
He reached the gallery ahead of them, breath-ward up, and pressed both palms to the wall.
The dead were still there, grey figures, endless loop, the woman's orders, the boy's laughter. And underneath, the chanting: three syllables, wrong in the same place, the unfinished technique still practicing itself.
Lin Xiao did something he'd never tried: he pushed back. Not with qi, he had none. With the echo-listening itself, reversed: he fed his own resonance into the stone, the way you'd hum against a plucked string to make it sing louder.
The gallery answered. The echoes swelled, boots, breathing, orders, laughter, chanting, all of it rising like a tide. To a tracking talisman tuned to qi and sound, the Silent Gallery would blaze like a signal fire.
Come and find me, Lin Xiao thought. I'm everywhere.
He heard them enter, Qingyao's light step, the captain's heavy tread, and he moved through the dark between the grey figures, humming under his breath. Chen's sword-song. The one he'd hummed as a boy during drills, the tune that went with the wine-pouring wrist.
He didn't realize he was audible until much later.
The captain followed the sound, followed it away from Qingyao, deeper into the gallery, toward the collapsed section where the smoke had weakened the ceiling. Lin Xiao kept just ahead, a whisper, a footstep, a half-heard tune, leading the armored man step by step under the cracked lintel-
- and kicked the keystone.
It wasn't a big collapse. Lin Xiao had spent an hour that morning weakening it further with a pillar shard, and he wasn't trying to kill anyone. The ceiling came down in a cough of dust and rubble, enough to seal the corridor, not enough to crush a man in half-plate. On the other side, the captain swore with impressive creativity.
"Digging'll take you a day," Lin Xiao called through the rubble, cheerful. "There's air. Try not to breathe the dust."
He turned, and stopped.
The grey figures had noticed.
The endless loop had stuttered. The dead keepers stood still among the dust, really still, for the first time, and a dozen grey faces were turned toward the collapsed corridor. Toward him.
The woman, Mei, the thirty-seventh keeper, looked at Lin Xiao across nine hundred years. Her mouth moved.
He didn't hear words. But he felt them, the way he'd felt the chanting: a pressure behind his eyes, an echo pushing through.
Not him, it seemed to say. Not like this. We died so the living wouldn't have to bury each other.
"I know," Lin Xiao whispered. "I'm trying."
The loop resumed. Boots, breathing, orders. The dead went back to dying.
Lin Xiao stood in the settling dust for a moment longer, his throat tight. Then he went to find Qingyao.
He found Qingyao standing frozen among the grey figures, her lamp shaking. He took her hand, she flinched, then knew, and led her out through the servant seam before the dust settled.
As they slipped into the dark, one of the grey figures, a young keeper with a broken spear, turned its head to watch them go. Its mouth moved. Lin Xiao didn't hear words, but he felt the pressure behind his eyes again, fainter this time:
Go. Live.
He squeezed Qingyao's hand tighter and kept moving, and behind them the grey figures resumed their endless dying, boots, breathing, orders, as if the living were just another verse in a song that never ended.
In the dark of the passage, he pressed the ward-stone into her palm. "For trackers. It warms when they listen. Now go, walk out like you escaped. Like you're scared. You should be. He'll be watching."
"Xiao-"
"Go."
She went. And Lin Xiao stood in the dark, listening to her footsteps fade, and didn't notice, until much later, that he'd been humming the whole time.
The talisman noticed.
The captain dug himself out in six hours. The talisman in Qingyao's sleeve went straight to Fang Che, and Fang Che played it, alone, in his tent, three times.
Boots. Rubble. And underneath, faint, half-lost in the gallery's dead noise, a tune. A sword-song, hummed in a young man's voice, in a cadence so old the captain hadn't recognized it.
Fang Che sent for Array Master Wen that same night. The old array master listened to the recording with his eyes closed, and went white.
"That cadence," Wen whispered. "That's not a sect tune. That's, young master, that's a keeper's intonation. The phrasing, the intervals, the keepers hummed their arrays into the stone, did you know? They tuned themselves to the wards." He opened his eyes. "The Ninth Heaven has a new keeper."
Fang Che was silent for a long time. Then he smiled, the slow, feral smile that meant someone was about to have a very bad day.
"Then we don't hunt a ghost anymore," he said. "We recruit one, or bury it." He stood. "Bring me the Heaven-Measuring Compass. And Wen -" his voice dropped, "- if it's a keeper, it can hear the heart of the ruins. We need to reach the heart first."
Wen bowed and went. Fang Che stayed, playing the recording a fourth time, listening to the dead boy hum his dead master's song, and wondering, for the first time in his life, whether he was the hunter or the hound.
Deep in the ruins, Lin Xiao sneezed in the dust, and Ku, sweeping his one eternal slab, said without looking up: "The old songs carry far, boy. Best to hum quieter."
"How did you-"
"I sweep," said Ku. "Dust remembers feet, and feet tell stories. Yours were singing."