AI The first thing Quinn noticed about the market was that someone had swept around the blood.
The second was the smell. Not the metallic tang under the arch, but oranges and burnt hair, thick enough to catch in her throat.
She stopped at the foot of the disused escalator and let her eyes adjust. A string of battery lamps ran along the old platform, lighting stalls made from trestles, packing crates and lengths of velvet . Half the tables were bare. The rest held jars, tarnished jewellery and little paper packets folded with meticulous care. Above them, a tiled sign gave the station a name she didn’t recognise. Someone had scratched through it, letter by letter.
A uniformed officer approached with an evidence bag.
“Token, ma’am.”
Inside was a narrow piece of yellowed bone, polished smooth at one end and pierced with a hole at the other.
“The man at the top wouldn’t let anyone down without one,” the officer said .
“Who is he?”
“Says he’s a caretaker. Won’t give his name.”
“Keep him there. And find out where he got these.”
She handed the bag back and crossed the platform. Her shoes clicked on the tiles. The sound carried much farther than it should have; there were no trains, no traffic, only a low drip somewhere beyond the dark mouth of the tunnel.
DS Malik stood beside a booth enclosed by iron grilles. He had his notebook in one hand and a paper cup in the other. He lifted the cup toward her.
“Tea. Probably cold.”
“Then you drink it.”
He took a cautious sip and made a face. “Welcome to Camden’s least charming shopping centre.”
Inside the booth, a man lay on his side among overturned boxes. His head rested against the leg of a stool, his grey coat bunched around his waist. Blood had dried in a dark fan beneath him. A brass padlock hung from the grille, and a strip of police tape blocked the narrow doorway beside it.
“Name’s Daniel Voss,” Malik said. “Forty-eight. No fixed address on the records we’ve found. One of the traders says he sold information.”
“About what?”
“Depends who’s asking, apparently.”
Quinn crouched outside the grille. Voss’s eyes were open. Someone had made an effort to close them and failed. A deep cut ran from beneath his left ear into the collar of his shirt. His hands lay near his face, one open, the other curled around a scrap of red thread.
“Who found him?”
“A woman called Eva Kowalski. She’s over there.” Malik tipped his head toward the old ticket office. “Says she was meeting him at ten. He was already dead.”
“What time did she call?”
“Ten seventeen. Had to get above ground for a signal.”
Quinn checked her watch . It was nearly one. The worn leather strap had darkened where the rain had reached it on her walk from the car.
“And your theory?”
“Someone came to buy information. They argued, buyer cut him, locked the booth and took the key. Maybe to stop anyone getting to him before he bled out.” Malik pointed to the padlock. “He’s got no key on him.”
The padlock was new, its brass bright against the flaking iron. Quinn leaned closer.
“Has anyone opened it?”
“Not yet. Scene team wanted photographs first.”
“Who put the tape up?”
“I did. There’s another entrance round the back. It was open when we got here.”
Quinn looked through the grille again. A pale powder lay across the booth’s floor, interrupted by Voss’s body and the legs of the overturned stool. On the far side, a canvas flap covered the rear entrance. The bottom edge was wet.
“What’s the powder?”
“Don’t know. Flour, maybe.”
“Anyone walk through it?”
“The first officer went in through the back. Says he didn’t touch the body.”
Quinn could see his broad tread marks, clear in the dust. They ran to Voss and back out. There were no other full prints.
“Show me the rear entrance.”
Malik led her between two stalls. A row of glass eyes watched them from a tray, each fitted with a different coloured iris. Beyond it, the wall was tiled in green and cream. Water ran down the grout from a leaking pipe and had gathered in a shallow puddle at the back of Voss’s booth.
The canvas flap lifted easily. Quinn shone her torch inside. The powder began just beyond the wet threshold, as if someone had thrown it from the entrance. A narrow furrow cut through it toward Voss’s coat. His heel lay in the furrow.
“He was dragged,” she said.
“Could have crawled.”
“The heel’s pointing the wrong way.”
Malik bent beside her. The furrow ended at a clean patch of tile under Voss’s ankle. Quinn traced the line back with her light. It began at the threshold, where the powder was thin and streaked with water.
“Your killer brought him in through here. Feet first.”
“Then went round and locked the front?”
“Perhaps. Why lock it at all? The back isn’t secured.”
“To make people think Voss had shut up shop.”
Quinn glanced along the row. From the main platform, the booth looked closed and orderly until a person came close enough to see through the grille. Malik’s suggestion made sense.
But Voss’s coat was dry.
She pointed it out. The bottom of the canvas flap was soaked, and a bead of water had formed on the edge. As they watched, it fell into the puddle.
“The body was carried over it,” Malik said.
“Feet first, without a single wet mark on his trousers?”
“Someone could have wiped them.”
“Someone could have. We’ll ask the lab.”
She stood and followed the green tiles away from the booth. Five paces along, a narrow doorway opened into what might once have been a staff room. It was empty except for a metal sink and a broken chair. The floor was dry. A fine white smear marked the outer edge of the doorframe at about shoulder height.
Quinn touched nothing. She angled her torch across the smear. It covered a shallow dent in the paint.
“Photograph this,” she said. “And get a swab.”
Malik called to the scene team. Quinn examined the corridor. The tiles had been scrubbed recently; the grout remained dirty, but the glossy faces shone in irregular circles. Near the staff-room door, a small crescent of blood had escaped the cleaning cloth. It sat in the chipped edge of a tile, almost black.
Voss had died somewhere near here. Someone had cleaned the wall and floor, then dragged him into the booth. They had taken care with the blood but missed the dent and the trace caught in the chip.
The question was why.
A woman stood by the ticket office, hugging a leather satchel against her chest. Her curly red hair had begun to escape its tie. As Quinn approached, she tucked a strand behind her left ear and pushed her round glasses up her nose.
“Ms Kowalski?”
“Yes.”
“I’m Detective Quinn. You were meeting Mr Voss?”
Eva nodded. Her green eyes moved briefly to the booth. “He said he had something for me.”
“What sort of thing?”
“A record. A list of objects that passed through London during the war.”
“Valuable objects?”
“To the right people.”
“And you’re one of them?”
“I work at the British Museum. Research assistant.” Eva shifted the satchel. Its leather was worn pale at the corners, and the weight of the books inside had stretched its straps. “The record might help us identify a group of artefacts in the restricted archives.”
“Is that official museum business?”
A pause. “Not exactly.”
“Did you tell Voss where you worked?”
“He already knew.”
“Did he tell you who else wanted the record?”
“No.”
Quinn took out her notebook. “Start from when you arrived.”
Eva had reached the market just before ten, she said. Voss’s booth was shut. She had called his name, then looked through the grille and seen him on the floor. A trader lent her a phone with a torch. She went round the back, found the flap open and checked Voss for a pulse .
“You went inside?”
“Only a step or two.”
Quinn looked up. “The powder on the floor. Did you notice it?”
“Yes. I didn’t want to tread in it.”
“So how did you reach him?”
Eva hesitated. “I knelt at the entrance. I could reach his wrist.”
From the position of the body, Quinn thought she probably could. “Did you move anything?”
“No.”
“Think carefully .”
Eva tucked her hair back again. “His hand was under his face. I pulled it out to feel for a pulse .”
“The right or the left?”
“His right.”
The open hand, then. The other still held the red thread. Quinn closed her notebook.
“What was he going to charge you for the record?”
Eva looked at her. “I don’t know.”
“You came to buy something without asking the price?”
“He wouldn’t discuss it over the phone.”
“And you came alone?”
“Yes.”
Malik emerged from behind the booth with a scene-of-crime officer. The officer carried a small brass object in a clear bag.
“Found this under the stool,” Malik said. “Thought you’d want a look.”
It was a compass, no bigger than a pocket watch . Green tarnish filled the grooves of tiny markings etched around its face. As Quinn took the bag, the needle swung sharply to one side.
She turned the bag. The needle remained where it was.
“Doesn’t point north,” Malik said. “Cheap ornament?”
Eva’s grip tightened on her satchel.
“You recognise it,” Quinn said.
“I’ve seen one like it.”
“Where?”
“In a book.”
“What’s it for?”
Eva watched the needle. “Finding things.”
“What things?”
“I’m not sure.”
Quinn held her gaze. Eva’s face was freckled and pale, and there was a raw patch beside one thumbnail where she had worried the skin away. Frightened, certainly. Whether of Voss’s killer or the police, Quinn couldn’t yet tell.
“Put your bag down, please.”
Eva set it on the ticket-office counter. Quinn opened it with a gloved hand. Three books, a notebook, pens, a packet of tissues. Between two books lay a folded sheet of paper. Quinn eased it out.
It was a photocopy of an old inventory, marked with a museum reference number. Several entries had been underlined in pencil. Beside one, Eva had written VOSS and a telephone number.
“Is this the record you were buying?”
“No. It’s why I needed to speak to him.”
The entry described a brass instrument received from a private collection in 1944. Most of the description had been obscured by a dark band on the copy, but a handwritten note remained visible at the bottom.
Recovered with personal effects. Morris, A.
Quinn read it twice.
“Who is Morris?”
Eva leaned forward. “I don’t know. It was already on the document.”
“When did you make this copy?”
“Yesterday.”
Quinn kept her voice level. “And Voss had information about this entry?”
“He said he knew where the instrument had gone.”
Morris was not an uncommon name. The initial was wrong, too. Her partner had been Daniel Morris, and he had died three years ago, not in 1944. Still, Quinn felt the old pressure behind her ribs: the hospital corridor, the unanswered questions, the report that had described his death as an accident without explaining how he came to be in the building.
She folded the copy and slipped it into a fresh evidence bag.
“I’ll need the original reference,” she said.
“I can write it down.”
“You’ll give it to DS Malik.”
The compass needle was still pointing sideways. Quinn carried it toward the corridor. The needle trembled as she passed the booth, then settled toward the staff-room door.
She stopped beside the cleaned tiles. The white smear on the frame was level with her shoulder. Up close, she could see a short red fibre caught in the dent.
Voss had thread in his hand.
She called Malik over and showed him. “Get the fibre and the thread compared.”
“You think he grabbed whoever attacked him?”
“Or whatever they were wearing.” Quinn looked at the empty staff room. “The wound, the blood here, the body dragged into the booth. The killer cleaned up and locked the front so the first person to arrive would see a closed stall.”
“Why leave the back open?”
“Because closing it wouldn’t matter from the platform. They wanted the delay, not a locked-room trick.”
Malik looked toward Eva. “And she found him anyway.”
“She arrived earlier than the killer expected, or she knew to look.”
Eva was giving the officer the museum reference. Her hand shook, but the numbers she wrote were neat.
Malik lowered his voice. “You think she did it?”
“I think she hasn’t told us what that compass is.”
Quinn moved the evidence bag closer to the staff-room wall. The needle swung again, until it pointed straight at a patch of green tile beside the sink. She stepped left; the needle followed the same patch. When she stepped right, it turned after it.
There was no obvious metal fixture behind the tiles. Quinn tapped the wall with a gloved knuckle. Solid. She pressed her palm against it.
Cold seeped through the glove. Not remarkable in an underground station, except that the tile beside it felt warmer.
“Get building plans,” she said.
Malik came to stand next to her. “For a magnet?”
“For whatever’s behind that wall.”
He examined the tiles. “There’s no door.”
“No.”
The white powder continued from the dent down the frame, a thin dusting caught in the paint. It ended against the wall at waist height. Quinn could see no scuff on the floor between the frame and the tiles, no streak to show that anything had passed along them.
Someone had cleaned here. They might have missed the blood and the fibre, then missed this as well. She wanted the photographs before anyone touched it.
Behind them, Eva said, “Detective.”
Quinn turned. Eva had left the ticket office. Her eyes were fixed on the compass.
“Please don’t put it against the wall.”
“Why?”
Eva swallowed. “It may not be safe.”
“Tell me why, and I’ll consider it.”
For a moment Eva looked as if she might refuse. Then she glanced toward Voss’s booth.
“Because it isn’t pointing north,” she said. “It finds places where the boundary is thin.”
Malik gave a short laugh, then stopped when neither woman joined him.
“What boundary?” Quinn asked.
Eva’s fingers found the loose strand of hair behind her left ear. “Between here and somewhere else.”
Quinn looked back at the wall. There was a chipped tile, an old sink and a narrow white streak. She had seen enough witnesses reach for impossible explanations when ordinary ones frightened them. She had also seen Morris’s body, and the photographs from the room where he died, and the mark on the floor that no one had accounted for.
“Get the plans,” she told Malik. “And keep everyone out of this room until we know what’s there.”
The compass needle quivered inside the bag. Quinn held it steady, watching the point settle once more on the wall.