*Leo*
The hansom cab rattles over the cobbles, and Lily sits opposite me with her hands folded in her lap, her gaze fixed on the window. She has not spoken since we left the mews. The morning light catches the side of her face, and I notice the fine tremor in her fingers before she stills them against the wool of her skirt. Outside, a costermonger bellows something about fresh eels, and she flinches.
I know better than to ask if she is all right.
The streets of London are a study in contradictions: the grand facades of Whitehall rising above gutters thick with horse dung, a flower-seller“s barrow wedged between a gin palace and a temperance hall. Lily“s eyes track a steam van as it lumbers past, its boiler hissing, and I see her mouth form a question she does not ask. She is cataloguing, I realise. Filing each anachronism against the London she knows, the London that will not exist for another century and a half.
“The air is different,“ she says, not quite to me.
“Coal smoke,“ I reply. “It gets into everything.“
She shakes her head. “No. It“s not that. It“s the weight of it. Thicker. Like breathing through wool.“
I have no answer for that. I have lived in this air long enough that I no longer notice it. That fact disturbs me more than I want to examine.
The cab deposits us on Whitehall Place, and I pay the driver while Lily stands on the pavement, one hand pressed flat against the iron railing as though she needs to feel something solid. The building before us is unremarkable: four storeys of soot-stained brick, a blue lamp above the entrance, the Metropolitan Police crest carved into the stone lintel. Clerks and constables stream through the doors in a steady current, their boots loud on the steps.
“Scotland Yard,“ Lily says. “At least they moved you to the main building… It“s smaller than I expected.“
“It grows as you go in.“
I offer her my arm. She takes it after a pause that is just long enough to register, and I feel the slight pressure of her fingers through my coat sleeve. We climb the steps together.
Inside, the air is close and warm, thick with the smell of ink and tobacco and damp wool. A desk sergeant looks up as we pass, and I give him a nod that does not invite conversation. The corridor beyond is a narrow canyon of filing cabinets and overburdened shelves, clerks bent over ledgers in attitudes of permanent exhaustion. The gas jets along the walls spit and gutter, casting shadows that move like something alive.
I steer Lily towards the back staircase. My office is on the third floor, a small room I have never bothered to make comfortable. It has a window that looks out onto a ventilation shaft, a desk that lists to the left, and a door that sticks in damp weather. It also has privacy, which is the only thing I require.
“This is where you work now,“ Lily says as I close the door behind us. It is not a question.
“When I am not chasing fires through time, yes.“
She does not smile. Her gaze moves across the room: the stacks of ledgers, the rolled maps tied with twine, the shelf of oddments I have accumulated over years of investigations. I see her pause at the chronometer, a brass and crystal contraption that sits at the end of the shelf like a mechanical insect, its gears exposed, its face etched with markings that do not correspond to any standard measurement.
“That belonged to my father,“ I say, before she can ask. “Augustus. He was tinkering with it for years. I never understood what it was meant to do until recently.“
“A chronometer.“
“A prototype. Crude, compared to the arches. But I believe it was his first attempt at a time-travel mechanism. Before he discovered the portals.“
Lily steps closer to the shelf, and I resist the urge to tell her to be careful. She does not touch it. She simply looks, her head tilted, and I can almost see her assembling the pieces: Augustus, the device, the killer who learned from him.
“You think the killer knew about this,“ she says.
“I think the killer learned everything Augustus knew. Including how to move through time without leaving a trace.“
She turns from the shelf. “Then we need to find what Augustus was hiding.“
I cross to the desk and pull out a chair for her. “We start with the records. Anything unusual, anything that does not fit the official account. Augustus was meticulous. If he investigated something, there will be a file.“
“And if he suppressed it?“
“Then there will be an absence. A gap where a file should be.“
She sits, and I see her register the faint must of old paper, the particular dust that clings to archived things. I have spent so many hours in rooms like this that I no longer smell it. Another thing I have stopped noticing.
“The cover story,“ Lily says. “You mentioned a cover story.“
“You are a distant cousin. Assisting with genealogical research.“ I pull a second chair to the opposite side of the desk. “It is thin, but it will hold. No one here questions a Thorne.“
“And if someone questions me?“
“Refer them to me. Cousin Mary.“
She makes a small sound that is not quite a laugh. “Mary. I keep forgetting.“
We begin with the ledgers. I bring down a stack from the shelf, volumes bound in cracked leather, their spines stamped with dates that span decades. 1860. 1865. 1870. Lily takes one, I take another, and for a while there is only the rustle of pages and the distant clatter of typewriters from the floors below.
The work is slow. Most of what we find is ordinary: burglaries, assaults, the petty violences of a city that has always been too crowded and too poor. But I am not looking for ordinary. I am looking for the moments when ordinary broke.
“Here,“ Lily says, after what feels like an hour. She turns the ledger towards me, her finger marking a line. “A constable“s report from 1867. A disturbance near the Temple. Witnesses reported a man appearing from nowhere in a flash of light.“
I lean across the desk. The handwriting is cramped, difficult to parse. “What did the constable conclude?“
“Drunkenness. He dismissed it.“
“Of course he did.“ I pull the ledger closer and read the entry myself. The location is specific: Middle Temple Lane, near the stone arch that connects to Pump Court. I know that arch. I have walked through it a hundred times and never thought to look twice. “There will be more.“
We find three more reports before the light outside the window begins to fade. 1871: a woman in Cheapside who vanished in front of six witnesses, only to reappear three days later with no memory of where she had been. 1878: a lamplighter who swore he saw a man step out of a stone archway near St Bartholomew“s and then step back in, disappearing entirely. 1880: a constable who filed a report about a “mechanical contraption“ found abandoned in an alley off Fleet Street, a device that hummed and glowed before it crumbled to dust in his hands.
Each report had been dismissed. Each file bore a notation in a hand I recognise: my father“s.
“He knew,“ Lily says. “Augustus knew about all of them.“
“He investigated them. And then he buried them.“ I close the ledger and press my palm flat against the cover. “The question is why.“
“To protect someone.“
“Or to protect his own work. If these incidents were caused by someone using his research, his methods, then any official inquiry would have led back to him.“
Lily is quiet for a moment. She has pulled her chair closer to the desk, and I notice the space between us has shrunk without either of us remarking on it. “You said the killer might be an apprentice. Someone who learned from Augustus.“
“It fits. The knowledge required to use the arches, to manipulate the timeline without collapsing it entirely. That is not something one stumbles upon.“
“Then we need to find out who Augustus taught.“
I rise and cross to the shelf where the chronometer sits. Up close, the device is even stranger: a series of concentric brass rings, each etched with symbols I have never been able to decipher, surrounding a crystal that catches the gaslight and holds it, glowing faintly. I have not touched it in years. I am not certain I should touch it now.
“This device,“ I say, “was meant to detect temporal anomalies. A resonance detector, my father called it. He was trying to build something that could track disturbances in time the way a compass tracks north.“
“Did it work?“