The Light Between Stations

My hands looked as though I had been clawing my way out of something by the time I came up from the basement store. They were raw and red along the edges where the skin met the nail beds. It was that particular kind of burn you get from handling old paper: the acids in it, the mould, whatever chemical reactions take place when newsprint from 1888 decides it has finished being newsprint and wants to return to dust.

Ten and a half hours.

That was how long I had been down there.

The British Library at St Pancras kept the flood-damaged material in a basement store that probably had not been designed for archives at all. It felt more like a converted maintenance area where they had put everything nobody wanted to look at any longer. The fluorescent lights hummed as though they were arguing with themselves. The air tasted the way I imagined the inside of a vacuum-cleaner bag would taste.

I was an archive conservator working on contract through Arts Council England's library and archive preservation programme, which was a grand way of saying I was the person they called when something went wrong with old documents and they needed someone to blame who was not on their permanent payroll.

A leaking heating main had probably failed late on Monday or early on Tuesday. Nobody had noticed immediately because hardly anybody went down there.

By the time someone did, twenty-five years of borough and institutional records had effectively become papier-mache. Rates ledgers, planning applications, correspondence between people who had been dead for sixty years about gas-lamp maintenance and rights of way. All of it was pulp now.

I had spent the day cataloguing the damage for the loss adjusters. Judith Wainwright, the contract manager - not technically my manager, although she behaved as if she were - had made it quite clear that this was somehow going to become my fault.

I was still not sure how I had managed to rupture a heating main in a building where I did not even work most days.

But Judith had that tone in her voice, that clipped bureaucratic coldness which meant she was already composing the email in her head. Contractor negligence. Inadequate storage recommendations. Failure to identify pre-existing risk. Whatever wording would protect the library and leave me hanging out to dry.

She had come down at about 15:00, stood at the bottom of the stairs in sensible flats and a blazer, her bifocals catching the hostile light, and watched me work for perhaps five minutes without saying anything.

Then she said, "I trust you're being thorough, Elliot. The loss adjusters will require complete documentation."

As though I did not know that. As though this was not literally my job.

I merely nodded. I did not have the energy to argue.

The newspapers were the worst. Bound volumes from the nineteenth century, their pages so brittle that they crumbled when I touched them. I had to wear nitrile gloves, but even through those I could feel the paper disintegrating.

Some of it had been beautiful once. You could still see the typesetting, the careful layout, advertisements for things which no longer existed. Patent medicines, carriage-repair services, a full-page advertisement for something called Professor Vale's Restorative Tonic, which promised to cure everything from consumption to moral weakness.

All of it fell apart in my hands.

By 21:20, I was done. Not finished. You could not finish something like that in ten and a half hours. I was done in the sense that I could not look at another water-damaged document without losing my mind.

My eyes burned with that particular sting you get from spending too long beneath fluorescent lights, as though your retinas are protesting. My lower back held a deep ache from hunching over archival boxes, and my hands felt as if I had dipped them in acid.

I wanted my flat. I wanted my sofa.

I wanted not to think about crumbling newspapers, Judith Wainwright's thin-lipped disapproval or loss-adjuster reports. I wanted to go home to Tooting Bec and sleep until I forgot what the basement store smelt like.

The library was nearly empty when I came up. Only a few people remained at the desks in the reading areas, the particular sort of late-evening visitor who treated the library like a sitting room because they had nowhere else to go.

I understood. I did not blame them.

The security guard near the entrance was a young man, perhaps in his early twenties. He looked half asleep and gave me a nod as I left.

The November air hit me like cold water, sharp and clean. It had rained earlier, and the pavement was still wet, reflecting the lights of St Pancras and Euston Road in long smears of yellow and white. Traffic hissed over the damp tarmac. A few people hurried past beneath umbrellas, and a couple were arguing in low voices near the entrance to King's Cross St Pancras Underground station.

I almost went in there. Then I remembered the interchange I would have to make and decided I could not face it. If I walked along Euston Road to Euston Underground station, I could take a direct southbound Northern line train towards Morden. The walk was longer, but it meant no changing lines at King's Cross St Pancras.

At that point, avoiding an interchange felt worth anything.

Driving from Tooting Bec to St Pancras could take an hour or more depending on traffic, which was why my used Ford Focus stayed parked outside my flat most working days. The Underground was supposed to be easier.

That night, I thought the extra walk to Euston might save me twenty minutes. Twenty minutes in which I could be horizontal. Twenty minutes closer to unconsciousness.

Euston Underground station smelt as it always did: metal, electricity, old concrete and something organic I had never been able to identify. Ozone, perhaps. Brake dust. Human existence compressed into tunnels.

I tapped my contactless bank card at the ticket barrier and headed down towards the Northern line.

The southbound platform was nearly deserted. That surprised me. It was shortly after 21:30 on a Thursday - 12 November 2026. I would have expected more people: late commuters, university students, the usual mixture of humanity filling the London Underground like blood in veins.

Instead, perhaps five people were scattered along the platform, all of them carefully avoiding eye contact.

A train was already there, standing with its doors open.

The display said it was a southbound Northern line service towards Morden. My train. Lucky, because I did not think I could bear standing on the platform for another ten minutes. My feet hurt. Everything hurt.

I walked towards the rear carriage.

I always travelled in the last carriage when I could. There were usually fewer people, it was quieter, and it was easier to switch off. The doors stood open, spilling pale fluorescent light across the platform.

Inside, the carriage was almost empty.

A man in a suit was asleep against the window. Someone in headphones stared at their mobile. I stepped aboard at 21:37 and took a seat near the end of the carriage.

Above the internal door leading to the enclosed gangway was a route diagram and a panel of emergency instructions. Beside it, clearly marked in red and white, was the emergency detrainment release. It was intended to unlock the end door if passengers had to leave the train in an emergency. The release sat behind a small breakable panel with a compact hammer clipped beside it.

I noticed it only because the writing was directly in front of me.

The plastic seat was cool against my back. I let my head fall against the window and felt the slight vibration of the idling train through the glass.

The doors remained open. I closed my eyes for a moment, just to rest them.

The public-address system crackled.

It was that familiar Underground sound, as though someone were crushing cellophane directly into a microphone. There was no announcement, only static, and then silence.

I should have got up then. I should have moved to another carriage, taken another train or walked back out of the station.

Something in my gut knew. That animal part of the brain which still remembers being prey, which can still read danger in the air before the conscious mind has found a reason for it.

But I was tired, and my hands hurt, and all I wanted was to go home.

The doors sounded their warning and slid shut with a smooth, final hiss. The man in the suit did not stir. The person wearing headphones did not look up.

Somewhere farther along the platform, I heard footsteps. Someone was running, trying to catch the train, but the doors sealed before they reached it.

The train lurched forwards with a small jolt that I felt in my chest and stomach. That moment of transferred momentum which meant we were moving now. Committed.

The lights of Euston slid past the windows, followed by the maintenance lights in the tunnel, and then there was only darkness interrupted by occasional bright flashes from lamps fixed to the tunnel walls.

We gathered speed. The carriage swayed, the wheels clicked against the rails and there was a brief squeal as we entered a curve. I kept my eyes closed and let the train carry me into the darkness beneath London, towards home, towards whatever was waiting between the stations.

I noticed the woman three rows ahead almost immediately.

That probably sounds odd. There were hardly any people in the carriage: the man in the suit, still asleep against the window; the person with headphones; and now her.

She must have been on the platform. I had not really looked at anyone when I boarded. I had found my seat and collapsed into it.

But when the train pulled away from Euston, I opened my eyes for a moment, and there she was.

She sat with precision. That was the word which came to me. Precision. As though someone had placed her in the seat and instructed her not to move.

Her hands were folded in her lap, one resting over the other, perfectly still. She wore a well-kept navy jacket with a visitor badge clipped to the lapel. From where I sat, I could make out the St Thomas' Hospital logo.

Her grey hair was pulled back so tightly that it looked painful. She had the severity of an old-fashioned schoolmistress, or the sort of librarian you saw in films.

Not a real librarian. Real librarians mostly wore cardigans and looked tired.

I tried to close my eyes again, but something about her posture bothered me.

More than bothered me.

She was sitting too straight. Too rigid. People did not sit like that on the Tube. They slouched, leaned or hunched over their mobiles. They sagged against windows or spread themselves across empty seats. They did not sit at attention as though waiting for inspection.

Her spine looked wrong.

That sounds dramatic, but I do not know how else to describe it. The angle of her back, the way her shoulders rested, was fundamentally wrong. It was as if something which had never seen a human being sit had arranged her body into what it thought sitting ought to look like.

I told myself I was being ridiculous. I had spent ten and a half hours in a basement store touching disintegrating paper. My hands hurt. My back hurt. My eyes hurt. I was exhausted and seeing meaning in things which were perfectly ordinary.

I closed my eyes and tried to concentrate on the sounds of the train: the rhythmic clatter of the wheels, the sway of the carriage, the low electrical hum which was always there if you listened for it.

Then I heard the clicking.

It was soft at first. Rhythmic.

I assumed it was mechanical. The train settling. Some part of the running gear doing whatever it was supposed to do. Metal against metal. Normal train noises.

But it was not metal.

It was organic and wet, like fingernails tapping against plastic, but not quite. Sharper. More deliberate.

I opened my eyes.

The woman's jaw was moving.

The movements were small and mechanical, like her posture. Her mouth remained closed, but I could see the muscles working beneath her skin.

She was grinding her teeth.

The clicking was the sound of her teeth meeting again and again, as steady as a metronome.

Click, click, click, click.

I looked away and stared at the emergency instructions above the end door. I read them without absorbing any of the words, letting my eyes move over the lettering merely to give them somewhere else to rest.

In an emergency, follow staff instructions. Use detrainment release only when the train is stationary. Beware of live traction rails.

The clicking continued. It did not quicken or slow. It simply went on.

The man in the suit remained asleep. The person wearing headphones did not move. Neither of them seemed to notice.

Perhaps they could not hear it. Perhaps their ears were not as tired as mine and had not begun seizing upon every tiny sound in the quiet carriage.

The train began to slow. The brakes engaged with their particular whine, and the carriage rocked as we decelerated.

Warren Street was the first stop south of Euston. I felt relieved.

People would board. The carriage would fill a little. Ordinary late commuters would get on. Someone might sit near the woman, and perhaps she would stop grinding her teeth, or I would be distracted enough not to hear it.

The train entered Warren Street. The darkness outside the windows gave way to fluorescent light, tiled walls, signs and pillars.

The platform was empty.

Not impossible at that hour, I told myself. It was after 21:30 on a Thursday. Most people were already where they needed to be.

The train stopped. The doors opened with their pneumatic hiss.

No one boarded.

I watched the open doorway and the empty platform beyond it. The clicking continued behind me, steady and relentless.

The doors remained open for perhaps thirty seconds, maybe forty-five. Then they closed.

Nobody had boarded. Nobody had got off.

The train lurched forwards again and pulled out of Warren Street into the tunnel. The light beyond the windows vanished, leaving only darkness broken by occasional maintenance lamps.

I took out my mobile. I did not really know why. Habit, perhaps. Something to do with my hands. Something to look at which was not the woman three rows ahead.

The screen lit my face. The battery showed 57 per cent. There was no signal, only the words at the top of the display.

No service.

Of course there was no service. I was underground, between stations. Sometimes I could get a connection on a platform, but the tunnels were unreliable.

I opened my messages anyway and looked at the last conversation I had had. A message from three days earlier, sent by a university friend I barely spoke to any more.

How's London treating you?

I had not replied.

I closed the messages and opened my email. Everything was frozen at the last point when I had had a connection above ground. Forty-seven unread emails, most of them newsletters I never got round to unsubscribing from.

The clicking stopped.

I noticed the silence immediately. The absence of the rhythm was more distinct than the sound itself had been.

There were only the noises of the train now: wheels on rails, the electric hum, the rush of wind through the tunnel.

I should have felt relieved.

I did not.

I looked up from my mobile.

The woman had turned her head, but not her body.

Her body still faced forwards. Her hands remained folded in her lap. Her spine remained rigid in that wrong way.

Only her head had moved, turned to an angle which made my stomach drop.

Too far.

Necks did not turn that far. They could not turn that far.

The human body had limits, angles it could not achieve without damage. Her neck had forgotten those limits.

She was staring directly at me.

Not at the space I occupied. Not somewhere in my general direction. At me. Through me.

Her eyes did not blink.

I watched for it. I waited for the natural reflex, the fraction-of-a-second closing and opening which eyes performed automatically to stay moist.

Nothing.

Her eyes were dark brown, perhaps, although it was difficult to tell beneath the carriage's fluorescent light. They did not appear to track anything. They were not focused on anything in this world.

She looked at me the way someone might look through a window at something far beyond it.

I could not move. My mobile was still in my hand, my thumb touching the screen.

The man in the suit remained asleep against the window. The person with headphones continued staring at their own mobile.

The woman's head stayed at that impossible angle.

Her eyes remained fixed on me. Through me.

Dread settled into my bones.

I know how that sounds, but that was what it felt like. It was not fear in my chest or stomach. It was deeper, lodged in my skeleton, in the structural parts of me, in the framework.

Something was very wrong.

The train continued moving. Wheels clicked against the rails.

Goodge Street was next, followed by Tottenham Court Road, Leicester Square, Charing Cross, Embankment and Waterloo. After that, the train would carry on south towards Tooting Bec and home.

I stared at the woman. She stared through me.

Neither of us blinked.

I stood.

I did not think about it or plan it. My body moved as though something deeper than thought had made the decision. The woman was still staring through me with her head twisted at that impossible angle, and I could not remain in that seat.

I could not keep looking at her.

My mobile slipped into my lap. I caught it before it struck the floor and shoved it into my pocket.

My hands were shaking. The raw skin from handling wet paper all day stung as I flexed my fingers.

The internal door to the next carriage was about three metres away. I fixed my eyes on it. Not on the woman. Not on her unblinking stare, the impossible rotation of her neck or the absolute stillness of her body.

Only the door.

I took one step. The train swayed and I caught hold of a metal pole to steady myself. My palm was damp against the cold steel.

Another step.

The woman did not move. I could feel her eyes on me even though I was no longer looking at her. The awareness crawled across my skin.

The man in the suit remained asleep. The person with headphones did not look up.

There was only me, the woman and whatever the hell was wrong with her.

Three more steps brought me to the internal door. My hand struck the release bar harder than I intended. The mechanism was stiff and required real force. I pushed, and the door opened inwards with a metallic groan swallowed by the clatter of the wheels and the roar of tunnel air.

The enclosed gangway between the carriages was loud. Wind hissed through its seals. Metal ground beneath my feet, and the articulated rubber sides flexed violently with the train's movement. The air smelt of brake dust and electricity.

I hurried through, keeping my eyes forwards as the train bucked and swayed, then reached for the next internal door.

The public-address system crackled.

I froze halfway through, one foot still in the last carriage.

Static burst from the speakers, high and distorted. Then came a man's voice, older perhaps, although it was hard to tell through the interference.

"Attention, passengers..."

The words warped and stretched.

"The train will be held at the next station while staff attend an ill passenger. Please remain seated."

The announcement collapsed into static and cut off.

Goodge Street was next. We could not have been more than thirty seconds away.

I could wait until then. I could get off and find platform staff. I could tell them about the woman and let somebody trained deal with her.

I pulled myself through the door and let it close behind me. The noise dropped to the ordinary sounds of the train.

But the train did not slow.

I felt it first through my legs. The floor was vibrating faster, not slower. The rhythm of the wheels quickened instead of easing.

We should have been braking for Goodge Street. I should have felt the familiar deceleration, that slight forward lean as momentum fought the brakes.

Instead, we were accelerating.

Platform lights appeared through the windows.

Goodge Street.

I saw the tiled walls, signs, support columns and empty platform rushing past far too quickly.

The train did not stop. It did not even slow enough to pretend it might stop.

I seized another pole as the carriage lurched around a curve. My glasses slid down my nose and I shoved them back into place with my free hand.

This carriage held more passengers. Not many, perhaps six or seven, scattered along the seats. A man in an Arsenal beanie slept in one corner. Two university students shared a pair of earbuds and watched something on a mobile. An older woman had several shopping bags at her feet.

Near the middle of the carriage, a TfL employee sat reading a paperback.

He looked up when I stumbled forwards. The train was still accelerating, travelling far too quickly through the tunnel.

I moved towards him. My legs felt unsteady, partly because of the train's violent movement and partly because of the adrenaline still flooding my system after what I had seen in the last carriage.

He was roughly 1.88 metres tall, broad-shouldered, with close-cropped hair greying at the temples and dark skin made darker by the harsh fluorescent light. He wore a navy TfL uniform with the roundel on the chest. His book was a thick fantasy paperback with a silver griffin on the cover.

"Excuse me," I said.

My voice emerged more quietly than I intended. I cleared my throat.

"Sorry, but the train isn't stopping. We just passed Goodge Street."

He looked at me with a patient, tired expression, as if he had spent years dealing with strange passenger problems and very little surprised him any longer.

His voice was deep and calm, with traces of an accent I could not place.

"It happens sometimes. Signal failure, perhaps. They'll sort it out at the next station."

"There's a woman in the last carriage." I gestured towards the internal door behind me. "Something's wrong with her. She's just sitting there, staring. Her neck is..."

I stopped.

How could I describe it without sounding insane?

"Her neck's twisted too far. She looks wrong."

The TfL employee regarded me without judgement, merely taking in what I was saying.

According to the name badge on his uniform, he was Malcolm Okafor.

He marked his place with a folded rail ticket and closed the book.

"Wrong how?"

"She's not moving properly. She's barely moving at all. She's sitting there with her head turned round, staring. There was this clicking noise, as if she was grinding her teeth."

I pushed my glasses up again. They would not stay in place.

Malcolm watched me for a moment.

"She may be having a medical episode," he said. "A seizure can cause rigidity. So can other neurological problems."

That explained the announcement. I had not considered it. The voice had said there was an ill passenger.

Perhaps that was all it was. A seizure, a stroke or some other medical emergency. Perhaps I had panicked because I was exhausted and unsettled.

But her eyes. The way she had looked through me.

"Can you check on her?" I asked. "Please. I don't know what to do."

Malcolm studied me for another few seconds. Then he sighed, a weary professional sound drawn from deep in his chest.

"Yes. All right."

He placed his book on the seat beside him, spine upwards to keep his place.

"Show me."

Relief hit me so hard that I nearly laughed.

I was not alone any more. Someone else was here. Someone in uniform, someone who probably had training for this sort of thing. Someone who could take over and deal with it.

Malcolm stood. He was even larger than I had thought, the sort of physical presence which made me feel safer simply by being beside him.

"Last carriage?" he asked.

"Yes. Back through there."

I pointed towards the internal door.

He nodded and began walking. I followed.

The train rocked, and Malcolm moved easily with it, balanced and accustomed to its motion. I had to keep correcting my footing and grabbing the poles.

We reached the internal door. Malcolm pulled it open without difficulty, as though the stiff mechanism were nothing. Noise surged through the opening.

Wind, grinding metal and speed.

He stepped into the enclosed gangway. I followed closely. My heart was beating so hard that I could feel it striking my ribs.

Every step towards the last carriage made it worse.

Malcolm opened the second door, and we went back into the carriage with the woman.

She was still there.

Her hands remained folded in her lap. Her spine was rigid. Her head was twisted round at that impossible angle, still staring at the place where I had been sitting.

The man in the suit had gone.

The person wearing headphones had gone.

There was only the woman.

Malcolm moved down the aisle. I stayed behind him, close enough to seize the back of his uniform if I had to.

My heart continued pounding. Each step brought us closer.

The clicking began again.

It was steady and mechanical, her jaw moving in those small, precise motions while her mouth remained closed.

Malcolm heard it. I saw his head tilt as he registered the noise.

We were about two metres away. Then a metre and a half. A metre.

My heart struck my ribs with every step.

The clicking continued. The woman did not blink. She did not otherwise move.

She merely ground her teeth and stared through empty space.

Malcolm stopped less than a metre from her.

I stopped directly behind him, close enough to smell the washing powder on his uniform and see a small scar on his left forearm.

The woman continued clicking and staring at nothing. We stood in the last carriage while the train raced through the tunnels beneath London, moving too quickly and failing to stop, carrying us towards whatever came next.

Malcolm moved perhaps thirty centimetres nearer and cleared his throat.

"Madam?"

His voice was steady and professional.

"Are you all right? Do you need assistance?"

Nothing.

The clicking continued. Her jaw worked through the same small mechanical motions. Her eyes remained fixed upon my empty seat, looking through it at nothing.

Malcolm waited.

Five seconds. Ten.

The train swayed and he adjusted his stance automatically, the way someone did after years of working around trains.

"Madam," he said again, more loudly. "Can you hear me?"

Still nothing.

Not a blink. Not a twitch. Only the clicking, the impossible angle of her neck and the complete rigidity of her spine.

Malcolm glanced back at me. I could not read his expression.

Perhaps he was beginning to understand that this was not an ordinary medical episode. Perhaps he was still considering seizures, strokes and other explanations which belonged to the world as we knew it.

He turned back to her and slowly reached out.

His hand moved towards her shoulder, fingers extended. The movement was professionally cautious, the way you might touch someone you were trying not to frighten.

His fingertips were perhaps five centimetres from her navy jacket when her hand shot upwards.

Fast. Too fast.

Her arm blurred, and her fingers clamped around Malcolm's wrist with a sound I heard from nearly two metres away. Skin against skin, but harder than it ought to have been.

Malcolm cried out. It was not a scream, only a sharp sound of pain and surprise.

I saw his face change. His eyes widened and his mouth opened. He tried to pull away, but her grip did not move.

His arm remained exactly where it was, locked in place by her hand.

"Jesus," he said, his voice strained. "Madam, you need to..."

She stood.

That is not the right word for what happened.

She did not stand. She was lifted.

Her body rose from the seat in sections which did not move as parts of a human body should. Her hips came up first while her shoulders stayed low. Then her spine straightened in segments: lower back, middle back, upper back. Each section snapped into alignment with a small, exact movement.

Her legs unfolded beneath her. Her knees bent at angles which were only slightly wrong, but wrong enough. Her feet planted flat on the floor, her weight distributed in a way which looked off-balance but somehow was not.

The entire movement took perhaps three seconds.

Malcolm stumbled backwards. Her arm extended so that she could maintain her grip on his wrist. Her elbow locked straight. Her shoulder rotated within its socket.

Her head was still facing backwards, still staring at my empty seat. Her neck remained twisted in that total, impossible rotation while the rest of her body stood upright facing Malcolm.

The clicking stopped.

Malcolm screamed.

Not the sharp cry he had made before. A real scream, full-throated and raw, the kind of sound I had never heard another person make in real life.

I ran.

I did not think or decide. My legs moved on their own. I turned and lunged towards the internal door.

My shoulder struck the frame as I shoved through. I stumbled into the enclosed gangway, fought the violent movement of the train, grabbed the next door and hauled it open.

Behind me, Malcolm was still screaming.

I crashed into the next carriage. The university students looked up from their mobile. The older woman with the shopping bags turned in her seat.

I did not stop.

I ran down the aisle, seizing poles to steady myself as the train pitched and swayed. At the far end, I struck the release bar and pulled the internal door open.

The next carriage held a few more people. Someone said something, but I did not hear the words. I kept running.

My glasses slid down my nose. I pushed them back with one hand while the other reached for the next door.

The lights died.

Everything went black.

Dim amber emergency floor lighting came on automatically, but its glow barely reached my knees. I could see the outline of the door ahead and almost nothing else.

I crashed through anyway.

I found the release bar in the dark and shoved the door inwards, then stumbled into the enclosed gangway. Wind screamed through its seals. The articulated floor shifted beneath me, and the train's violent movement threw me against one wall.

I could not see the mechanisms below the gangway or anything beyond the amber line at my feet. There was only darkness, wheels hammering against rails and the sense that the train was still travelling much too quickly.

My hands found the metal frame of the next door. I pulled myself through.

Behind me, Malcolm's screams changed.

They became wet. That is the only way I can describe it. It sounded as though something had entered his mouth or throat. The scream broke apart, became abbreviated and wrong, and then stopped in the middle of a note.

It simply stopped.

I dragged myself through the next door.

The amber emergency floor lighting gave me just enough illumination to make out shapes: seats, poles and the outline of the next internal door.

My lungs were burning. My throat felt raw. I could not draw enough air, but I kept moving.

I grabbed the next door, pulled it open and crossed another enclosed gangway. The train lurched. I almost fell but caught myself on a pole.

The clicking started again somewhere behind me.

It was faster now, rapid and mechanical, and it was growing louder.

I kept running.

My mind would not hold on to what I had seen. Every time I tried to think about Malcolm, his wrist trapped in her grip, the way she had risen or the sound his scream made when it changed, my thoughts slid away. I could not process it. I could not fit it into anything that made sense.

So I ran through the dark train, following the dim amber lines along the floor while my lungs burned, my hands stung and my heart slammed against my ribs hard enough to make me think something might break.

The train continued moving. Faster, perhaps. Or perhaps it only felt that way.

I forced open another internal door and pulled myself into the next carriage.

The train stopped.

It did not slow. It did not brake normally or draw into a station. It simply stopped.

The brakes screamed. The entire train lurched forwards, and I seized a pole to prevent myself being thrown into the seat ahead. My shoulder struck the metal anyway, hard enough to send pain through my arm.

The wheels locked and shrieked against the rails for perhaps three seconds.

Then there was silence.

Complete silence, apart from the ringing in my ears.

I stood beneath the dim amber emergency lighting, breathing hard and listening for the clicking.

Nothing.

There was only my breathing and the faint hum of something electrical within the carriage walls.

The train had stopped somewhere in a tunnel. I had no idea where.

We had passed Goodge Street without stopping. I did not know whether we had raced through Tottenham Court Road, Leicester Square, Charing Cross, Embankment or Waterloo while I was running. I could not reconcile the speed, the elapsed time or the number of carriages I had crossed with any real section of the Northern line.

We might have been somewhere south of central London. We might have been nowhere near the route at all.

The windows showed nothing. There were none of the maintenance lights I expected to see, no reflection from cables or equipment, only pure black pressing against the glass.

Beyond it lay concrete, timber sleepers and London Underground's live traction rails, nominally 630 V DC. I knew those things had to be there.

I could not see any of them.

I tried to catch my breath. My lungs burned and my throat was raw from breathing through my mouth as I ran. My hands shook so badly that I had to grip the pole with both of them to remain steady.

The carriage was empty.

I did not remember when the other passengers had disappeared. The university students sharing the earbuds, the older woman with her shopping bags, the people in the other carriages - all of them were gone.

There was only me, standing in the amber glow and staring at the black windows.

My mobile buzzed in my pocket.

At first I barely registered it. Then it buzzed again, two short vibrations against my hip.

I pulled it out. My hands were shaking so badly that I nearly dropped it.

The screen showed one bar of signal.

That made no sense. I was underground in an unidentified section of tunnel, and I had had no signal earlier. Yet there it was.

A message notification waited at the top of the screen.

Unknown number.

I opened it.

Stay in the light.

That was all. Four words. No context. No explanation.

The message had been sent at 21:55. My mobile's clock showed 21:57. The battery had fallen to 55 per cent.

I stared at the message, my thumb hovering over the screen.

I wanted to reply. I wanted to ask who it was, what the hell was happening and whether Malcolm was alive.

Even though I knew he could not be. Not after what I had seen and heard.

The message had arrived while I was running through the darkened carriages.

I looked up at the amber emergency floor lighting. It was still glowing, faint but steady. The ceiling panels remained dead. Those dim lines were the only light in the carriage.

Stay in the light.

I looked at the windows again.

The darkness outside pressed against the glass in a way that felt wrong. It did not seem like a mere absence of illumination. It seemed thicker than that, as though the blackness itself possessed weight.

I could not explain it. It was probably my mind making everything worse.

Probably.

The mobile buzzed again.

I looked down so quickly that my glasses slipped. I shoved them back into place.

Another message from the same unknown number.

Don't wait.

My heart was already pounding. It kicked harder.

I typed with shaking thumbs.

Who is this?

The message failed to send.

The single signal bar vanished. No service.

I tried again. The same thing happened. My reply remained on the screen in grey, marked unsent.

Don't wait.

Do not wait for what?

I knew.

The clicking. The woman. Whatever she was. Whatever had happened to Malcolm.

I needed to move. I could not remain on the train.

The emergency detrainment release was at the end of the carriage, the same clearly marked mechanism I had noticed when I boarded. I moved towards it and tried to read the instructions.

My eyes would not focus. The letters swam. I read the panel three times before the words made sense.

Use only when train is stationary. Break panel. Operate release. Keep clear of live traction rails.

The small emergency hammer was clipped beside the panel. I seized it. The plastic bracket cracked as I pulled, and the hammer came free.

I swung it at the breakable panel.

It shattered more easily than I expected. Fragments dropped and scattered across the carriage floor.

I reached through, gripped the release and pulled hard.

Something hissed inside the door. The lock disengaged, and the end door opened perhaps twenty centimetres.

Cold air rushed through the gap.

The smell struck me immediately: concrete dust, metal, oil and perhaps ozone. The smell of deep underground.

I wedged my fingers into the gap and pulled. The door resisted. I pulled harder, and it slid open another thirty centimetres.

It was enough.

I squeezed through sideways. My shirt caught on something and tore, but I did not stop. I forced my shoulders through, then dragged the rest of myself after them.

I dropped. It was perhaps a metre down to the gravel beside the tracks. My knees buckled when I landed and I went down hard on one hand. Sharp stones bit into my palm.

The raw patches left by a day of handling wet paper screamed. I forced myself upright. The tunnel was completely black except for the dim amber glow spilling through the open end door of the train behind me. I could see perhaps two metres.

Beyond that was only darkness, solid and thick and absolute.

I pulled out my mobile and switched on the torch. The beam cut into the dark, but it did not reach far. Three metres at most before it simply stopped.

It was as though the darkness were swallowing it.

The traction current hummed through the rails to my left. I knew what they carried: London Underground's nominal 630 volts of direct current, divided between positive and negative conductor rails. Both could kill me.

I pressed myself against the right-hand wall of the tunnel. The concrete was cold and slightly damp. Keeping one shoulder against it, I began to walk. Gravel crunched beneath my shoes with every step.

The sound echoed behind me and ahead of me. I could not tell which direction it came from. There were only echoes in the dark. I pointed the mobile forwards and kept walking.

The tunnel stretched away in both directions. There were no other lights, no exit signs, only concrete, rails and darkness pressing in from every side. Something dripped nearby. Or far away. Water striking stone.

The echoes made every distance wrong.

I kept moving.

The torch showed gravel, timber sleepers and shining rails. The wall remained at my right shoulder. The live traction rails ran to my left, humming their constant warning.

Do not touch. Do not go near.

My breathing sounded far too loud. Each breath came back to me from the tunnel walls. I had gone perhaps ten metres when I saw it.

A light ahead, small, amber and steady. It was not a torch and it was not moving. It was simply there.

I stopped. The gravel shifted beneath my feet, then fell silent.

The light might have been fifteen or eighteen metres away. It was difficult to judge in the dark. It looked like a maintenance lamp in one of the tunnel refuge recesses, those narrow cut-outs where workers could shelter clear of a passing train.

Stay in the light.

I started walking again, faster this time. My footsteps cracked across the gravel and I no longer cared about the echoes. The light drew closer.

Twelve metres.

Behind me, something clicked.

I did not stop.

I did not look back. I walked faster, the torch beam bouncing with every step.

Six metres to the light.

The clicking came again. Steady and mechanical, the same rhythm I had heard on the train.

Three metres.

My foot slipped on something loose. I caught myself against the wall and scraped my hand across the concrete. Pain flared through my palm, but I kept moving.

The refuge recess was there, cut into the right-hand wall, a little over a metre deep and perhaps a metre wide. A weak amber maintenance lamp glowed behind a wire guard overhead. Its light was feeble but steady.

It carved a small circle of visibility out of the immense darkness.

I stepped into it. My back struck the rear wall. I pressed myself against the concrete and pointed my mobile towards the way I had come.

The clicking was louder now. Closer. It came from the direction of the train.

I could see nothing beyond the circle cast by the lamp. Only blackness, thick and waiting. The clicking continued, steady, rhythmic and wrong.

Every shadow seemed to move. Every noise became something approaching. The dripping water, the electrical hum from the traction rails, my own breathing. They all felt like threats I could not see.

I kept my eyes on the darkness and on the weak torch beam reaching scarcely two metres into nothing. Above me, the amber lamp burned steadily behind its wire guard. That light was all I had, the only thing between me and whatever was clicking out there.

I concentrated on it. That small amber circle cut into the underground black.

The only beacon in all that darkness. The only safe thing.

I stayed in the light.

The maintenance lamp began to flicker when I was only a few steps into the recess.

It was not a normal flicker, not the sort caused by ageing wiring or a loose connection. It stuttered rapidly - on, off, on, off - in bursts that made the shadows jump and twist in ways that did not correspond to the light.

I pressed my back harder against the rear wall and kept the mobile pointed towards the tracks.

The clicking stopped.

Somehow, the silence that followed was worse.

My torch cut through the stuttering darkness, its beam seeming to break apart with every pulse of the lamp. I could see gravel, rails and timber sleepers. Nothing else.

Then the lamp steadied for perhaps two seconds.

She was standing about six metres away, between the running rails, completely still.

The woman from the train. Navy jacket. Grey hair drawn back tightly. Her hands hung at her sides now instead of being folded in her lap. Her head faced forwards at a normal angle. Her posture was perfectly ordinary.

She might have looked completely ordinary if she had not been standing motionless in a dark Underground tunnel, six metres from me.

Her visitor badge caught the light.

St Thomas' Hospital.

The clip reflected a tiny bright point as the lamp began to stutter again.

On, off, on, off.

In the broken light, I could see her jaw moving. Small, mechanical motions.

Her mouth remained closed, but the muscles worked beneath her skin. The clicking began again, loud and precise. It ricocheted between the concrete walls and folded over itself until I could not tell whether there was one source or several.

My mobile almost slipped from my hand. My palm was wet.

The damaged skin stung as I tightened my grip. The lamp pulsed on, off, on, off. Whenever it went dark, the torch was the only light, and it showed nothing but empty gravel and rails. Whenever the amber light returned, she was still there.

The same position. The same distance. Her jaw working with mechanical precision.

I could not move. I was pinned against the back of the refuge recess with nowhere to go. Forwards meant walking towards her.

Behind me was solid concrete. To either side was less than a metre of space before the mouth of the recess.

The clicking quickened.

Her jaw moved faster to match it.

The motion no longer looked human. It was too precise, too rhythmic. Her entire body remained perfectly still while her jaw worked and that sound rebounded through the tunnel.

The flickering intensified. The lamp was pulsing so quickly that it became like a strobe at a concert, the sort that breaks movement into a succession of still photographs. Except every photograph showed her standing there, teeth clicking, her dark, unfocused eyes staring at nothing.

I tried to retreat further, but I was already against the wall. The concrete was cold through my shirt and damp enough for moisture to seep into the fabric.

Her visitor badge caught each pulse of light. Flash after flash, that tiny bright reflection.

I thought of Malcolm. His wrist locked in her grip. The way he had screamed. The wet quality the scream had taken on before it stopped.

My mind tried to slide away from the memory again, but I was trapped in the recess, watching her, and there was nowhere else for my thoughts to go.

The lamp pulsed faster.

In the stuttering light, she appeared to move even though she did not. Each flash found her in exactly the same place, but my mind supplied motion between the images. It made her seem to vibrate, to flicker, to occupy several positions at once.

The clicking came from in front of me, behind me and above me, all at the same time.

I checked my mobile without meaning to. It had been at 57 per cent when the train stopped. Now it showed 55 per cent, no signal and a torch beam too weak to matter.

The amber lamp strobed. Her jaw worked. The clicking continued.

I could not breathe properly. Every breath was too short and too shallow. My throat was raw from running, and now I was gasping without taking in enough air.

The refuge recess felt smaller. Tighter.

The lamp pulsed on, off, on, off, on...

Then it died.

It stopped in the middle of a pulse. The amber light went out completely and did not return.

The only illumination left was the torch beam cutting through the absolute darkness, showing gravel, rails and nothing else.

She was somewhere out there. Six metres away, or closer, or directly in front of me.

I could see no farther than the torch's reach, and the beam extended barely three metres before the darkness swallowed it. I pulled the mobile closer, lowered it, then swept it left and right across the mouth of the recess.

Nothing. Only the edge of the cut-out, the tracks beyond it and blackness.

There was no clicking. Complete silence, apart from the hum of the traction current and my own breathing.

Fast, ragged and much too loud.

I pressed my back against the wall and held the mobile in both hands to steady it. My hands were shaking so badly that the beam jittered across the sleepers.

Nothing moved in the light. There were no shapes, no shadows and no visitor badge catching a reflection.

I could hear only my heartbeat. It struck my ribs so hard that it hurt. Every beat seemed to shake my chest. I felt it in my throat and ears, a pounding rhythm that smothered every other sound.

The terrible, mechanical clicking had stopped.

I strained to hear it over my heartbeat and breathing.

Nothing.

Perhaps she had gone. Perhaps she had walked back towards the train. Perhaps the lamp's failure had driven her away.

I did not believe that. Not really. But I thought it because the alternative was that she remained somewhere in the darkness nearby, watching me - or not watching, but staring through me with those unfocused eyes.

My breath came in short, rapid gasps. I tried to slow it and could not. Each inhalation felt insufficient. Each exhalation left me desperate for air again.

The torch showed nothing. Gravel, rails, timber sleepers, concrete wall and empty darkness beyond the beam.

I do not know how long I stood there. Time ceased to mean anything specific. There was only darkness, heartbeat and the memory of the clicking inside my head.

Seconds passed. Or minutes. I could not tell.

My legs began to shake. Not only my hands now, but my entire body.

I slid down the wall. I did not decide to do it. My legs simply gave way, and I sank until I was sitting on the floor of the refuge recess with my back against the concrete and my knees drawn up.

The mobile remained in my hands, pointed into the darkness.

From the lower angle, the beam showed exactly the same thing.

Nothing. Empty tracks. Blackness.

I could no longer think clearly. My thoughts fragmented and broke apart. I saw Malcolm's face as he screamed. Then the woman standing beneath the flickering lamp.

Then my empty flat in Tooting Bec. Then the basement store at the British Library, filled with wet, deteriorating paper.

Nothing connected. Nothing made sense.

My glasses had slipped down my nose again. I pushed them back with one trembling hand.

The darkness pressed in.

That was what it felt like. Not an absence of light, but a presence pushing against the small circle made by my mobile, trying to get closer.

I pulled my knees more tightly to my chest and curled into the corner where the wall met the floor. The concrete was cold and damp. Moisture seeped through my trousers, but I did not care.

The torch stayed trained on the opening. My thumb rested on the screen. The battery had fallen to 54 per cent. Keeping the torch on was draining it quickly.

I should have moved. I knew that. I should have stood up, walked on, found a station or an emergency exit or anything at all. But I could not make my body cooperate. I could not make my legs work.

I could do nothing except sit there, folded into the refuge recess, pointing my mobile into the darkness.

My breathing slowed a little. I was not calmer, only exhausted. Each breath remained ragged, but the gasping eased. My heartbeat was still too fast and too hard, but it had found a steady rhythm.

I listened for the clicking and heard nothing. Only the electrical hum. Only my breathing. Only silence.

Time continued not to mean anything.

I may have closed my eyes. I am not sure. The darkness seemed the same either way, with the torch or without it. I could not see anything that mattered.

My mind went somewhere else. I was not asleep or unconscious. I simply retreated inside myself, somewhere I did not have to think about the woman, Malcolm, the train or any of it.

I sat in that refuge recess in the dark, waiting for something to find me. Waiting for the clicking to begin again. Waiting for rescue, or morning, or anything.

The mobile remained in my hands. The beam stayed pointed outwards as the battery ticked down from 54 per cent to 53.

Eventually it reached zero.

I waited.

I do not remember them finding me. That part is simply gone.

Rachel Hughes told me afterwards that I was still holding my mobile when she and Tom Whitaker came through the tunnel. The torch was dead and the battery was at zero. I was curled in the refuge recess with my back against the wall and my knees drawn to my chest, clutching a dead mobile as though it could still protect me.

She said I did not respond when they called. I did not look up when they shone their torches on me. I only sat there staring at nothing, my thumb resting on the black screen.

They found me two hours and forty minutes after the train stopped.

Two hours and forty minutes.

I remember none of it. Only the recess and the darkness, and then, without any transition, I was somewhere else under hostile fluorescent lights while people spoke around me.

The train was still standing in the tunnel when they found me. Rachel and Tom had walked through its entire length before reaching the refuge recess.

Every carriage was empty.

There was no woman in a navy jacket with tightly bound grey hair and a St Thomas' Hospital visitor badge. No man in a suit asleep against the window. No university students sharing earphones. No older woman surrounded by shopping bags. No Malcolm Okafor with his fantasy paperback, its silver griffin on the cover and a folded rail ticket marking his place.

Nobody.

The emergency detrainment release at the end of the carriage was still damaged. The internal panel I had broken was on the floor, and the handle had been pulled down. The end door still hung partly open, leaving the gap through which I had climbed.

That part was real. I had done that.

But the rest of it...

They asked me about the announcement. The distorted one before Goodge Street, saying the train would be held at the next station while staff attended an ill passenger.

There had been no announcement.

The operational log showed nothing. No emergency call, no report of an ill passenger and no request for assistance. The public address system had not been activated at all.

I told them about Malcolm and described him perfectly. Roughly 1.88 metres tall, broad-shouldered, with close-cropped hair greying at the temples. Navy TfL uniform. Name badge. A small scar on his left forearm. Reading a fantasy paperback with a silver griffin on its cover.

They found Malcolm Okafor in the employee records easily enough.

He was forty-five and had worked for TfL for fifteen years, usually on the Northern line. Every detail matched.

Except Malcolm had reported sick at 16:20 on 12 November 2026. He had told his supervisor that he had flu and would not be working that evening. He had never left his flat in Stockwell.

His flatmate confirmed it. Malcolm had spent the entire night at home, watching television and drinking lemon and ginger tea.

I was in the accident and emergency department at University College Hospital when they told me.

A different hospital from the one named on the woman's visitor badge.

I was in a treatment bay separated by curtains, surrounded by beeping machines and fluorescent lights that made everything look worse than it was, when Detective Sergeant Colin Ward came to speak to me.

He looked about fifty, with thinning hair and tired eyes. He sat in the plastic chair beside the trolley and took a small notebook from his pocket.

He said they had reviewed the CCTV from Euston Underground station.

I had boarded alone at 21:37. I had walked straight to the rear carriage by myself and sat near the emergency detrainment release. The carriage had been empty when I entered.

It had remained empty at Warren Street, when nobody boarded. It was still empty when the train passed Goodge Street without stopping.

I told him about the sleeping man in the suit, the university students with their shared earphones, the older woman with the shopping bags, Malcolm with his book, and the woman whose neck had twisted beyond any human limit.

He nodded, wrote something in his notebook and asked how much alcohol I had consumed that day.

None.

I had spent ten and a half hours in the basement store at the British Library, assessing wet records after a heating main had failed late on Monday or early on Tuesday. I did not drink at work.

I told him I hardly drank at all.

He asked about drugs, prescribed or otherwise.

Nothing. I did not even take aspirin unless I truly needed it.

He asked whether I had any history of mental illness, hallucinations, seizures or anything similar.

No. Nothing.

I had never seen things that were not there. I had never heard voices. I had never lost time before those two hours and forty minutes in the refuge recess, and that had been different. That had been shock, exhaustion or something else with a normal explanation.

Detective Sergeant Ward nodded again and wrote more in his notebook. Then he asked why I had smashed the emergency panel, operated the detrainment release and entered the tunnel.

I told him about the woman rising from her seat with that smooth, mechanical motion. I told him about her hand locking around Malcolm's wrist. I told him how Malcolm had screamed and how the scream had become wet before it stopped.

Ward turned back through his notes and reminded me that Malcolm Okafor had reported sick, had not been on the train and could not have been seized by anyone because he was at home in Stockwell.

I knew what I had seen.

He closed his notebook and told me to rest. He said someone would contact me if they had further questions.

He did not sound as though he believed me. He sounded as though he were humouring someone who had suffered a breakdown.

They kept me in overnight for observation. They performed a CT scan in case I had struck my head and ran blood tests for drugs, toxins or anything else that might explain what had happened.

Every result was normal.

Judith Wainwright came to see me the following morning. She was not technically my supervisor, though she behaved as if she were. She stood at the foot of the trolley in sensible flats and a blazer, with her bifocals hanging from a chain around her neck.

She asked whether I was feeling better.

I told her I was fine.

Judith said the British Library understood that I had undergone a difficult experience. She would be happy for me to take a few days to recover, but the documentation for Arts Council England's library and archive preservation programme had to be completed as soon as possible. The loss adjusters were waiting.

I returned to work the following Monday.

I spent another six hours in the basement store with the flood-damaged archive and the leaking heating main. I completed the forms and documented the losses among twenty-five years of borough and institutional records - rates ledgers, planning applications, and correspondence about gas-lamp maintenance and rights of way.

My hands had mostly healed by then. The raw patches had scabbed over.

I told nobody else what had happened. What would have been the point?

The CCTV showed an empty carriage. Malcolm had been ill at home. There had been no announcement about an ill passenger. No woman wearing a St Thomas' Hospital visitor badge.

I must have suffered some sort of episode. Stress. Exhaustion. Ten and a half hours underground in a basement store, handling wet paper and breathing air tainted by mould.

These things happen.

Except that I still hear the clicking sometimes.

It wakes me in the night. I dream of tunnels, dim amber emergency floor lighting and impossible bodily angles. Then I hear it.

That rhythmic mechanical grinding. Teeth against teeth, precise and wrong, coming closer.

I wake drenched in sweat, my heart racing and my hands shaking. It takes time to convince myself that it was only a dream. Only my mind replaying something that never happened, or happened differently from the way I remember it.

I do not use the Northern line any more.

I know how foolish that must sound. The CCTV showed nothing. Malcolm was never there. The woman was not real. It was all in my head - some stress-induced hallucination or fugue state, or whatever phrase the doctors put in their notes.

But I cannot do it.

I have tried. I have stood on the southbound platform at Euston and watched trains towards Morden arrive and depart, but I cannot make myself step aboard.

I drive now.

I bought a used Ford Focus two weeks after it happened. The journey from my flat in Tooting Bec to the British Library at St Pancras takes an hour or more, depending on traffic. The Tube would be far quicker.

I drive anyway.

I take streets where the lights remain on, where other cars move around me and illuminated shopfronts spill light across the pavement. Streets where people walk dogs and wait at bus stops. Where darkness is only the ordinary darkness between street lamps, not something deeper that swallows torchlight and breeds things with twisted necks and impossible grips.

I survived that night.

That was what Rachel Hughes said when she rang my mobile a week later. I suppose she had obtained the number from the hospital. She said she was glad I was recovering. She said I had survived and that was what mattered.

I thanked her. I told her I appreciated her finding me.

She said it was her job.

Then she apologised that it had taken two hours and forty minutes. They had been dealing with a signal failure and a loss of traction power in that section of tunnel. Several trains had stopped, and it had taken time to determine which one I was on.

Two hours and forty minutes in the darkness, holding a dead mobile and staring at nothing.

I survived, but I left something behind in that refuge recess beneath the weak amber lamp that flickered and died. I left it in the tunnel where the woman stood between the rails, where Malcolm screamed and the clicking came from every direction.

I do not know what to call it.

Not my sanity. I am not mad. The tests proved that. Everything came back normal.

Perhaps it was only the part of me that could board a train without thinking about it. The part that could sit in darkness without wondering what might be sitting beside me. The part that could close my eyes and rest without seeing her neck twisted backwards and her jaw working in small, mechanical motions.

That part did not return with me.

It is still down there somewhere in the tunnels beneath London, in an operationally impossible stretch of darkness south of central London that I cannot locate on any map and cannot reconcile with the stations we passed or the time that elapsed.

It remains in the light between stations, where the trains do not stop, where the lamps go out, and where something waits in the spaces no passenger is ever meant to see.

I left it there.

I am never going back for it.