Read Chapter 7: Tunnels Below

The maintenance tunnel key was cold brass, worn smooth at the edges by decades of thumbs. Eamon turned it over in his palm, listening to the hum of the museum's circulatory system—pipes groaning, air ducts sighing, the distant thrum of boilers. Above him, through the grate he'd pried open, the Great Court gleamed under its glass canopy, pristine and oblivious.

Below was another world entirely.

He descended the ladder into a corridor of bare concrete and exposed conduits. The air changed quickly—thicker, older, carrying a mineral tang like the inside of a cave. His torch beam cut through the dark, catching on rusted pipe fittings and the occasional chalk scrawl from electricians decades dead. The walls breathed. He told himself it was the ventilation.

Maggie's words echoed in his head. *The museum has its own secrets.* Understatement of the century. His ribs still ached from the pulse that had thrown him across the gallery floor, and his phone was a brick with a dead signal. Danny's face stared at him from memory, frozen in that news alert—*former soldier found dead near Thames*—and the message he'd sent a week ago buzzed like a trapped fly in Eamon's skull. *Relics that remember.*

The tunnel forked. Left led toward the Egyptian galleries, according to a corroded sign. Right went deeper, past a faded stencil of the museum's original floor plan. The chamber the scarab had projected was central, beneath everything. He went right.

The corridor sloped. The concrete gave way to older brickwork, then to stone blocks so massive they could only be original foundations. The torchlight barely skimmed their surfaces. Carvings flickered at the edge of his vision—every time he looked directly, they were just weather-worn marks. Every time he looked away, they seemed to shift.

He stopped. Listened. The rumble he'd felt in the Greek wing was stronger down here, a low vibration through the soles of his boots. Like something enormous grinding against itself. The stone door. Still opening.

The corridor ended in a steel door, newer than everything around it, fitted with a combination lock. The key didn't fit. Eamon crouched, studying the mechanism. It was museum-issue, the kind used on storage rooms and sensitive archives. He tried the code Maggie had given him—her birthday, she'd said with a wink, though he suspected it was actually her badge number. The lock clicked.

The room beyond was an archive, but not like any archive he'd seen. No acid-free boxes, no catalogued shelves. Just metal filing cabinets, some so old they had crank handles, arranged in crooked rows. Dust sheeted everything. A single bare bulb hung from the ceiling on a frayed wire. He pulled the chain. It buzzed on, casting a sickly yellow glow.

The cabinets were labelled by year. He scanned them—1871, 1872, 1873—and stopped. The handwriting on the labels changed over time, but the subject matter was consistent. *Anomalous acquisitions. Items of concern. Irregular provenance.*

He pulled a drawer. It slid out with a screech. Inside, manila folders stuffed with photographs, newspaper clippings, and typewritten reports. He picked one at random. 1888. A bronze amulet from a private collection in Cairo. The report noted that three guards reported hearing whispering in the Egyptian gallery for a week before the object was moved to "deep storage."

Another folder. 1734. A carved jade disc. Two curators went missing overnight. The disc was "contained" beneath the museum. The language was careful, almost bureaucratic, but he could read between the lines. This wasn't a storage archive. This was a ledger of the weird.

He worked through the drawers methodically, scanning dates. The pattern emerged so clearly it made his skin prickle. Every two hundred years—1734, 1934, and scattered notations in between—the reports spiked. Multiple objects acting up. Lights seen where they shouldn't be. Noises. "Unrest" was the word they used, with a capital U. And always, in the middle of it, a reference to a single artifact that seemed to trigger the others.

The Codex. He'd assumed it was unique. But the reports called it "the keystone," a term that appeared again and again, always with a modifier: *the keystone object*, *the present keystone*, *the keystone in its current form*.

His torch flickered. He shook it, and the beam steadied. In the far corner of the room, past the last cabinet, a wooden crate sat on a trestle table. It wasn't covered in the same layer of dust as everything else. Someone had been here recently. He crossed to it, the floorboards creaking under his weight.

Inside, wrapped in oilcloth, was a diary. Leather-bound, the spine cracked, the pages edged with the brown of old age. He opened it carefully. The handwriting was cramped, frantic, a soldier's scrawl or a madman's. The name on the inside cover made him pause. *J. Wainwright, Night Security, 1998–2001.*

The file he'd read earlier had been thin. *Wainwright: terminated. Psychological deterioration. Claims of contact with museum artifacts.* The kind of report that got a man pensioned off quietly and forgotten. But this diary was thicker than the file, and the pages were dense with observation.

Eamon read by torchlight, skimming. Wainwright had noticed the same things Eamon had—the statues shifting, the whispers, the sense of being watched. He'd charted the activity, connected it to the Codex, and reached the same conclusion about the underground chamber. But his theories had gone further. The diary mentioned "cycles" and "pantheons," sketches of multicoloured lights, annotations in the margins that didn't make sense until Eamon realized Wainwright had been documenting what he saw when the artifacts were awake.

*They don't just wake up,* Wainwright had written. *They recognise each other. Old rivalries. Old debts. The Greek stones remember the Persian fire. The Egyptian gods remember when the Romans stole their temples. When the keystone opens, all of it comes back. A night of many gods. They will settle their scores in the city above.*

The handwriting grew more erratic toward the end. *The keystone is not what it seems. It changes. It has always changed. The Codex is just its current mask. To stop the night, you must isolate the true keystone. Remove it from the pattern. But you won't know what it is until it acts.*

The last page had come loose from the binding. Eamon turned it over carefully. In the middle, drawn in ink that had faded to brown, was a crescent-shaped blade. Curved like a sickle, ornate, with markings along the inner edge that looked like stars or scattered seeds. Beneath it, Wainwright had written three words.

*Not the Codex.*

Eamon stared at the drawing. The Codex had pulsed, projected maps, thrown him across a room. It was the most obviously dangerous thing in the museum. But Wainwright had been watching for three years, and he'd died—or disappeared, or been sectioned, the file didn't say which—convinced that the real danger wore a different face.

Something scraped in the corridor behind him. Eamon spun, the torch beam cutting through the dark. Nothing. The rumble from below had grown louder, a steady grinding now, like boulders shifting against each other. The stone door was almost open.

He looked back at the diary. The crescent blade stared up at him, patient, inscrutable. Above him, through the ceiling, he could feel the weight of the museum—every artifact in every wing—waiting for the moment the door beneath them slid fully open.

His radio crackled. The voice that came through was not Maggie's. It was the woman's voice, the one from the bust, thin and urgent as if she were speaking from very far away.

*He is not warning you. He is preparing you.*

The radio went dead. Eamon stood alone in the archive, the diary in his hands, the drawing of the crescent blade burning in his memory, and the grinding below him growing louder and louder.