AI The disused escalator had stopped mid-flight, one step frozen higher than the rest, and Detective Harlow Quinn planted her boot on it as if it might start moving again out of spite.
"Mind the third tread down. It's rotted through."
Sergeant Adeyemi's voice floated up from the dark below, bounced off tile, came back wrong. Everything down here came back wrong. Quinn had worked a body in a lift shaft, a body in a slurry pit, a body folded into a chest freezer in Peckham, and none of those places had made her ears feel like they were full of wool.
"Who found him?"
"Urban explorers. Two kids from Kentish Town with a GoPro and no sense." Adeyemi's torch swung . "They came in through the vent shaft behind the kebab shop. Called it in at four twenty."
"And uniform's been down since?"
"Since five. Nobody's touched anything, guv."
Camden's abandoned station had been sealed since 1924, according to the placard someone had bolted to the hoarding above. Quinn didn't believe placards. Sealed places had a smell, dust and pigeon and old iron, and this place smelled of none of that. It smelled of cloves. Cold, sweet, faintly medicinal. Like her grandmother's cupboard.
She reached the platform and stopped.
The tiling ran cream and oxblood, cracked in places, and where it cracked, something had been chalked over it. Not graffiti. Graffiti had ego. Graffiti wanted an audience. These were tight little clusters of marks, wrist-sized, repeated at intervals of roughly two metres along the whole curve of the wall, and they had been drawn by someone with a steady hand and no interest in being admired .
The body lay in the six-foot, down where the rails would have been if the rails were still there. Somebody had lifted the rails. Somebody had taken up the sleepers too, and swept the ballast flat, and the flatness of it made Quinn's neck itch.
"Male, forties, no ID." Adeyemi crouched at the platform edge, careful, hands off the tiles. "Blunt force to the back of the skull. Doc's putting time of death somewhere between midnight and two. There's a length of scaffold pole eight feet from the body with hair and tissue on the end."
"Convenient."
"Or careless." He straightened. "Look, guv, I've been thinking. There's a rave scene runs through these places. Deep-level parties, unlicensed. You get a hundred kids in a hole like this, you get pills, you get dealers, you get someone owing someone. Fight breaks out, one lad picks up a pole, everyone scatters and leaves the poor sod bleeding out on the trackbed."
"That's a story."
"It's a workable story."
"It's a story that explains the pole." Quinn crouched. Her knees complained. Forty-one, eighteen years, and the knees kept a ledger. "It doesn't explain the floor."
Adeyemi looked at the floor. "What about the floor?"
"There's no dust."
He said nothing. She let him look . It was one of the reasons she kept him.
The trackbed had been swept . Not brushed by draught, not scuffed by trainers, swept, in long overlapping arcs, the way you'd sweep a shop floor at closing. The arcs ran up to within a foot of the body and stopped.
"They swept before," she said. "Not after. If you sweep after a killing you're hiding footprints and you'd sweep through the blood. There's no drag in the blood. Nobody touched this floor once he was on it."
"So the place was clean when he came down here."
"The place was prepared." Quinn stood and walked the platform edge, torch low. "Fifteen years I've been getting called into holes in the ground. Every one of them had a mattress in it, or a needle, or a Special Brew can from 1998. Where's the rubbish?"
"Maybe they cleared it for a party."
"Then where are the lights? The rigging? You don't rave in the dark, Sergeant, you rave under lasers and you leave your cable ties behind." She stopped. Angled the beam up at the wall.
Hooks. Eight of them, iron, set into the tile at head height in a line, each one worn shiny at the underside curve. Something had hung on those hooks, and hung heavy, and hung there often. Nothing hung on them now.
"That's Victorian ironwork," Adeyemi said. "Could be original. Lamp hooks."
"The tile's 1907. The hooks are through the tile, not under it, and the mortar round them is white. Fresh mortar goes grey in a year down here." She moved along . "Someone put these in and someone took down whatever was on them, and they did it in a hurry, because they left that."
Her beam caught it. Twelve feet along, in the join between wall and floor, a scrap of oilcloth no bigger than a bus ticket, dark green, edged in a fine gold thread that had been stitched , not printed.
"Bag it."
"That's a bit of tarp, guv."
"That's the corner of a stall canopy. Someone had a market down here."
Adeyemi laughed once, without much in it. "In a sealed station."
"Which brings me back to how our two teenagers got in through a vent shaft behind a kebab shop." Quinn crouched again, at the body this time, and made herself look properly.
Male. Fifty rather than forty; the hands aged him. Good coat, wool, hand-finished buttonhole, worn at the cuff in a way that meant he'd owned it fifteen years and had it repaired instead of replaced. A man with money and no interest in showing it. His shoes were wrong for London. Soles thin as paper and no grip at all, the sort of thing you wore indoors, and yet the uppers were scuffed to death.
"His pockets."
"Empty. All of them."
"All of them how? Turned out, or emptied?"
Adeyemi crouched to look . Frowned. "Not turned out. Nothing's inside out."
"So whoever robbed him took the time to put his lining back. Under a hundred kids scattering in the dark." Quinn's torch travelled down the man's arm. The right hand lay open, palm up, fingers curled loose.
The left was a fist.
She'd seen enough of the dead to know a fist made at the moment of dying from a fist made after. Rigor kept a secret if you asked it politely. She took a pen from her jacket, slid the barrel into the curl of the fingers, and eased.
Brass. Small. Round.
A compass, no bigger than a pocket watch , its casing green with verdigris and its face scratched all over with markings that were not letters and not numbers and not any compass rose she'd ever seen. She turned it in the torchlight. Sigils, tight and interlocking, biting into the brass.
The needle swung. Settled. Pointed past her left shoulder, into the black mouth of the tunnel.
She shifted her feet, turned ninety degrees, and looked again.
The needle hadn't moved. Still the tunnel.
"Guv." Adeyemi's voice had gone flat. "North's the other way. The vent shaft's north. I checked my phone on the way down."
"I know."
"Compasses go funny near iron."
"There's no iron left in this floor. They lifted it." Quinn stood, holding the thing level on her palm, and the needle sat steady as a judge, aimed at nothing but dark.
Three years ago, in a basement in Deptford, DS Morris had gone through a doorway that hadn't been in the building's plans, and Quinn had followed twelve seconds later and found brick. Solid, mortared, filthy brick, with her partner's torch still lying on the floor in front of it, still switched on. They'd written it up as absconding. She'd signed the form. She'd signed the bloody form.
"Get the two witnesses separated and printed," she said. "And find out who owns the freehold above this station. Not the leaseholder. The freehold, going back."
"You think the kebab shop's in on it?"
"I think somebody's been running something down here every month or so, and last night they packed up in ten minutes flat and left a man on the floor and this in his hand." She closed her fingers round the compass. Cold. Colder than brass had any business being. "Which means either they didn't know he was dead, or they knew and something worse than a body made them run."
Down the tunnel, far off, something dragged along the ground and stopped.
Adeyemi's torch snapped up. "Rats."
"Rats don't stop."
The needle in her palm turned, slow and certain, and followed the sound.