Three Knocks Beneath the Minch

The suspension began on 12 February 2026. By March, I had stopped pretending I was going to do anything productive with it.

The Scottish Government Marine Directorate's official language for what happened was "failure to adhere to documentation standards", which is a clean way of saying I filed a report about something I saw and nobody wanted it on record.

What I saw was a large, slow-moving return, roughly 45 m long, travelling against the tidal flow along a deep channel west of Isle Martin. It did not match any known vessel, shoal, cetacean or migratory pattern in the Minch.

I had sonar data. I had timestamps. What I did not have was a single colleague willing to say they had seen the same thing on their screens, even though two of them had been sitting beside me.

So: suspension pending review.

That is Marine Directorate language for go home and be quiet.

I went home. I was not quiet exactly, but I was alone, which is close enough.

My flat in Inverness is fine. It is small and faces the wrong direction, and the radiator makes a sound like someone dragging a chair across concrete whenever it comes on, but it is fine.

I spent the first two weeks going back through my sonar files. In the third week, I began pulling archived incident reports from the regional database. Anything flagged around Isle Martin or the Summer Isles over the previous twenty years.

In the fourth week, I found a forum.

I am not going to pretend that is not embarrassing. It is a little embarrassing.

The forum was called Deep Water Watch, and it looked as though it had been designed in 2004 and never updated. Its header image was a blurred photograph of something in the water that was probably a log. Most of the threads concerned government satellites and weather modification.

Not exactly my usual reading material.

There was, however, a subforum called Minch Anomalies. Some of the posts there had been written by people who clearly spent real time at sea. Specific depths. Specific positions. The sort of details that do not come from someone who has never read a sonar display.

I had been lurking for about two weeks when the thread appeared at 02:47 on 18 June.

The title was: CAUGHT SOMETHING IN THE NETS. NEED HELP IDENTIFYING?

It had been posted by a user called MinchAngler74. Three images were attached.

I looked at them for perhaps thirty seconds before I understood what I was seeing. Then I looked for another ten minutes.

Three figures lay tangled near the weighted end of a deep-water monkfish tangle net. They were pale. Not merely fair-skinned, but pale in the way that suggests no exposure to sunlight at all. Like things that had never been near the surface.

They were hairless and roughly human in proportion, but wrong in the specific ways that matter. Their fingers had fused into broad, flat paddles. Their eyes were completely sealed beneath what looked like a second layer of skin. Their mouths were too small and their nostrils nearly flush with their faces.

Four slits were visible on either side of the largest one's ribcage.

They were tangled together, and whoever had taken the photographs had stood above them on the deck, pointing the camera down.

The replies were what you would expect. Photoshop. Mannequins. An elaborate prank. One person said it was a viral marketing campaign for a film.

The original poster had not replied since uploading the images.

I checked the account's previous posts. They were all about fishing around the Summer Isles: catch weights, gear recommendations, weather windows. One complained about diesel prices in Ullapool harbour.

Not a troll account. Not someone building towards a reveal.

I had my field bag packed in about fifteen minutes: waterproof jacket, cargo trousers, the worn boots I had owned since my postgraduate days, recorder, notebook and external hard drive. I picked up my Marine Directorate pass out of habit, looked at it for a second, then put it back.

I was suspended. Technically, I had no authority to do any of this.

I went anyway.

The A835 from Inverness to Ullapool is roughly fifty-seven miles. In clear weather it takes about an hour and a half. That morning, heavy rain lay over the hills and surface water had gathered on the bends. With a stop at Contin, the journey took just under two hours.

I bought motorway-service coffee and a cold Scotch-egg roll at an independent filling station with a handwritten notice in the window saying CARD MACHINE TEMPERAMENTAL.

The coffee was bad. I drank all of it.

I did not call anyone. I did not contact HM Coastguard. I did not involve the regional Marine Directorate office or NatureScot.

I told myself it was because I did not yet have enough to go on, which was true. I also told myself it was not because I had burnt enough bridges since February that I was unsure anyone would answer, which was less true.

Ullapool on 19 June was busy enough to be awake but not yet overwhelmed by summer visitors. Delivery vans stood along Quay Street. Fishing boats moved in and out beyond the ferry berth. The Minch showed between the buildings, grey and flat beneath the rain.

I had worked these waters for four years before the suspension. I knew them the way you know a road you have driven so often that you stop thinking about each bend.

I found the forum post's location by working backwards from the images. The net was identifiable: a particular mesh and rigging arrangement used by a handful of boats working deep-water monkfish grounds around the Summer Isles. At the edge of one photograph was a section of stern rail I remembered seeing at the Ullapool fishing pier.

It took about forty minutes of cross-referencing the harbourmaster's public berth records on my mobile phone before I had a name.

The Mairi Jane, a creel and netting boat registered to Iain MacLeod of Aultbea.

The Harbour Cafe was on Quay Street, half a block from the water. It was the sort of place that had been there for ever and smelt like it: coffee, bacon fat and something underneath that might have been the building itself.

I walked in at 08:15 and found all four of them at a round table by the window, eating fried eggs and tattie scones and drinking tea. Eating breakfast as if it were an ordinary Friday, as if they had not pulled three impossible things from the Minch nine hours earlier.

I recognised Iain MacLeod from his harbour registration photograph. He was a large man, weathered, with the sort of face that had spent decades outdoors in bad conditions.

He looked up when I entered.

I told the woman behind the counter that I was meeting someone and walked over to their table.

I want to be clear that I am not good at this part. The interview part.

I am good with data. I can read a sonar return or a water-column sample and tell you something useful. Talking to people about things they do not want to discuss is a different skill, and I have never fully developed it.

What I did was show MacLeod the forum images on my phone.

I did not introduce myself. I did not explain why I was there. I simply put the phone on the table in front of him and waited.

He looked at the images for a long time.

The other three men fell silent.

"Where did you get those?" he said.

It was not really a question.

"They are public," I said. "Posted at 02:47 this morning."

He picked up his mug and put it down without drinking.

"Who are you?"

I told him I was a researcher, which was technically still true. I asked whether we could speak separately, one at a time.

He did not exactly agree, but he did not refuse. When I moved a chair to a corner table at the back of the cafe, he followed after a minute. The other three stayed where they were and watched us.

MacLeod was straightforward. He had hauled the net at about 21:47 the previous night, south-east of Tanera Mor, from a depth of roughly 27 m. The figures had been caught together near the weighted end. His crew had cut the mesh away and freed them onto the deck.

They had been alive.

He was certain of that. He said it without hesitation.

They had breathed slowly and irregularly, and they had been warm to the touch.

"How long were they on deck?" I asked.

"Twenty minutes, maybe. Then they went back over the side."

"You put them back?"

"No. They went on their own. One moved towards the rail. The other two followed."

I wrote that down.

"Did anyone touch them whilst they were on deck?"

He paused. Only for a beat.

"The young lad did. Been crewing with us about three weeks."

I looked up from my notebook.

"What young lad?"

"Not permanent crew. Just helping out. Callum something."

I put down my pen.

MacLeod kept talking. He said Callum had been untangling the net when the figures came up. He had placed both hands on one of them for several seconds before realising what he was touching.

When contact was made, something had happened to the one nearest him.

The sealed eyes had moved beneath the skin. They had tracked towards Callum as if they could see him through the covering.

I picked up my pen and wrote that down as well. My handwriting was worse than usual.

Callum Reid is my younger brother.

He is twenty-six. The last time I had spoken to him was at Christmas, and he had not mentioned Ullapool, the Mairi Jane or any intention of working on a fishing boat. He had joined MacLeod's crew three weeks before the catch and had told me nothing because that is how Callum operates. He does things and tells you afterwards, if he tells you at all.

I interviewed Ross Campbell next, then Euan Fraser, who was visibly shaken and spoke faster than the others. Alasdair Kerr came last. He talked slowly, choosing each word, and confirmed everything the others had said, including the part about Callum.

None of them knew where Callum was. He had left the boat after they berthed and had not been seen since.

I sat at the back of the Harbour Cafe with a notebook full of witness accounts and no idea where my brother was. I ordered tea I did not drink and looked through the window at Quay Street.

I left it untouched until it went cold.

Outside, nothing interesting happened. A battered Land Rover pickup passed. A woman walked a dog. Ordinary Ullapool things.

I did not know where to begin looking for Callum.

That is the honest answer.

He had not checked into local accommodation under his own name. I had already called the guesthouses and hotels I could find, and none had a Reid matching his description. His mobile rang through to voicemail twice and then stopped connecting altogether, which probably meant the battery had died.

Callum carries a phone that is always at four per cent.

I left the cafe around midday and went down to the waterfront. I thought I might at least search the harbour and ask whether anyone had seen him along the pontoons.

Nobody had, or nobody said they had.

I walked the length of the fishing pier and back. I wrote nothing in my notebook because there was nothing to write.

Mairi Sutherland's office stood at the end of the harbour building, a low structure that smelt of diesel and old rope. She was the assistant harbourmaster and the local liaison for the fictional NatureScot Summer Isles Marine Reserve.

I had telephoned her that morning, shortly after arriving in town. She was the only local official who had answered and not immediately told me to contact HM Coastguard.

She had not exactly believed me either, but she had listened, which put her ahead of most people I had dealt with since February.

She was at her desk when I knocked. She was in her fifties, with short grey hair and a face accustomed to weather.

She looked up and said nothing for a moment.

"Did you find the crew?"

"Yes. All four of them. Everything checks out."

She nodded once. "And your brother?"

"Still looking."

She did not press me. I appreciated that.

We spoke for perhaps twenty minutes. I went through the crew's accounts. She asked practical questions about the net position, its depth and the time of the catch.

A chart of the Summer Isles hung on her wall, marked in red pen with notations I did not ask her to explain.

She said she would listen to the VHF traffic and let me know if anything came in. I gave her my mobile number. She already had it from my morning call, but I wrote it on a self-adhesive note anyway and left it on her desk.

That is me. Redundant about contact information.

Police Scotland accepted my missing-person report that afternoon. The officer took Callum's details, circulated his description and checked what records were available. But I could not give them a last confirmed position beyond Ullapool harbour, and there was no evidence that he had gone back to sea. Without a probable search area, they would not request a marine operation. The Mairi Jane's informal arrangement with Callum also meant he was absent from the submitted crew list, though the officer made clear that this did not prevent him being recorded as missing.

By the following day, however, enquiries had already begun to narrow instead of expand. Harbour CCTV was said to be unavailable. No formal request went to HM Coastguard. Someone above the local station decided there was no evidence of immediate danger.

At the time, I thought that was ordinary institutional caution.

Mairi telephoned at 21:47 that night.

I was sitting in my car in the car park of a small hotel on Shore Street, eating a petrol-station cheese-and-pickle sandwich I had bought two hours earlier and mostly ignored.

"Something has washed ashore," she said. "Below the reserve visitor centre. You should come."

I was there in eight minutes.

The NatureScot Summer Isles Marine Reserve visitor centre stood on a rise above the shore outside Ullapool. A steep path ran down from it through wet grass and scrub.

I followed it in the dark with a torch in one hand, my field bag over my shoulder and my camera hanging from my neck. Another light was already moving across the shingle below.

Mairi.

She had arrived before me, which made sense because she had called from somewhere closer.

The beach was otherwise empty. Not a soul in sight.

The Minch was doing its usual thing. Low waves. That particular sound of cold sea against stone: flat, repetitive and uninterested.

Cloud covered most of the sky, and the moon was behind it.

I saw the body before I reached the waterline.

It was 1.86 m long, pale and hairless. It lay face upwards at the edge of the last reach of the tide, half on wet stones and half on dry.

Its skin was the same colour as the figures in the forum photographs, a greyish white unlike the skin of any animal I had examined. Its fingers had grown together into broad paddle shapes.

The eyes were sealed. The covering was smooth and continuous. No lashes. No crease. Just skin drawn over the places where eyes should have been.

It was dead. Obviously dead.

There was no movement, no rise of the chest. The way it lay had a finality I cannot properly explain, except to say that living things do not arrange themselves like that.

Mairi stood several metres away.

"It came in with the last set," she said. "Maybe twenty minutes before I rang you."

I nodded and began working.

I photographed it from every angle I could manage. Full body. Close views of the hands, face and torso.

Four sealed slits ran along each side of the ribcage, parallel to the ribs in a way that looked deliberate. Architectural. I photographed each side separately, then took out my measuring tape.

The corpse measured 1.86 m from crown to heel.

Calcified nodules began at the base of the skull and continued down the length of the spine. Their spacing was irregular, with the largest clustered around the middle of the back.

I pressed one with my thumb. It did not yield at all. More like bone than cartilage.

I photographed the nodules, recorded their measurements and kept going.

Mairi watched without saying much. Once she asked whether I needed more light. I said yes, and she directed her torch towards my hands.

That was the extent of our conversation for a while.

The slits were sealed. Not sealed by injury. Simply closed, as though they had never opened or had closed on purpose.

I had a field knife in my bag for taking samples. I opened the blade and looked at Mairi.

"I want to cut into one of the slits."

She shrugged. "It is your documentation."

I made a careful incision along the uppermost slit on the left side.

The tissue was denser than I expected. The knife went through, but it required more pressure than it should have.

When the slit opened, fluid escaped. Not much. Perhaps a tablespoon.

It was dark and thin. It struck the stones and disappeared between them almost at once. Some splashed across Mairi's boots.

She looked down, then back at the corpse.

"Huh," she said.

That was all.

Neither of us said anything more about it.

I opened the remaining three slits on the left side and documented each one. The same fluid emerged from all four: the same colour, roughly the same volume.

The internal structures were folded and vascular, unlike lungs but recognisable as respiratory tissue. Gills. There was no sensible alternative.

I collected a fluid sample in a small tube from my field bag. I did not know what I intended to do with it. Old habit. You collect what you can and decide later.

I did not know then that Mairi had been compromised years before. The fluid on her boots did not create the link. It reactivated something dormant and made it stronger.

By the time I finished, it was after 23:00. I had forty-three photographs, a full page of measurements, a fluid sample and a dead creature lying beneath a NatureScot visitor centre that would not open for another ten hours.

I stood and looked at what I had.

On 12 February, I had filed a report about an unidentified 45 m return moving against the tide along a deep channel west of Isle Martin. My own directorate had treated it as though I had reported a flying saucer.

Nobody had come to investigate. Nobody had authorised a follow-up. They had suspended me and waited for me to disappear.

Now I had a body. Measurements. Forty-three photographs. Four witness statements from men who had handled the net.

And one of those men was my brother.

I still did not know where he was.

Standing on that shore with Mairi in the darkness and the Minch making its flat, cold sound behind us, I felt for the first time since March that I was ahead of something instead of behind it. The situation had acquired a shape I could work with.

I did not say any of that aloud. Mairi was not the type, and neither am I.

"I will make some calls in the morning," she said. "Keep this quiet until we know what we are dealing with."

"Yes," I said. "That works."

I drove back to the hotel, uploaded the photographs to my laptop and backed them up onto two separate drives. I have learnt certain things about institutional memory the hard way.

Then I opened my notebook to a clean page and wrote everything I could remember about the texture of the gill tissue, the colour of the fluid and the force I had needed to put behind the knife.

I did not sleep much.

I kept thinking about the nodules along the spine.

Their spacing was not random.

I was fairly sure it was not random.

I wrote that down as well, although I did not yet know what it meant.

In the morning, I had a thread to follow.

It came from something Euan Fraser had said, the one who spoke quickly and looked shaken. He had heard a story from a commercial diver who worked around the Summer Isles and Loch Ewe. Something about an old wreck and what had happened to the crew who found it.

I had recorded it as a side note and circled it twice without knowing why.

I searched for the Gairloch Heritage Museum archive on my phone. It opened at 09:00.

I reached Gairloch at 08:52 and sat in my car eating an oat bar that tasted of cardboard and honey. Through the windscreen, I watched a woman in her sixties unlock the archive entrance with a ring carrying perhaps fifteen keys.

She did not look up.

I gave her three minutes to settle, then went inside.

The interior smelt of old paper and central heating. A front desk held a computer that looked as though it dated from about 2008. Behind it was a room of shelves, and behind that another room I could not see.

The woman sat at the desk. She wore reading glasses on a beaded chain and a cardigan with a small embroidered bird on the lapel.

A coal tit, perhaps. I am not an ornithologist.

"Looking for anything specific?" she asked.

"Maritime records. Wrecks in Loch Ewe, late 1920s."

She did not blink. She probably received requests like that often, or something close enough.

"I am Jean Mackenzie," she said. "Do you have a vessel name?"

"SS Ardvreck. Lost on 16 November 1929."

She typed, studied the screen, then typed again.

"We have local shipping records from 1912 to 1945, personal papers from several fishing families and some transferred material from the Scottish Maritime Museum."

More typing.

She removed her glasses and let them hang from the chain.

"There is a file. It came to us with a donation in the 1980s. Mostly crew papers and a partial survivor statement. It has not been digitised."

"That is fine."

She took me to a reading room at the back. It contained a folding table, two chairs, a lamp with a pull chain and a sign saying PLEASE USE COTTON GLOVES WHEN HANDLING ORIGINAL DOCUMENTS.

She gave me gloves and a grey archival box, then left me alone.

A label on the side read:

SS ARDVRECK LOCH EWE NOVEMBER 1929 DONATED MATERIALS - BELL ESTATE

I wrote it down.

Inside was a water-damaged shipping manifest, most of it illegible. Beneath that lay a crew list typed on thin paper gone brittle at the edges, followed by a folded newspaper cutting dated 19 November 1929.

Its headline read: CARGO VESSEL LOST IN STORM - ONE SURVIVOR REPORTED.

Below those, in a separate acid-free sleeve, was a twelve-page handwritten document.

The handwriting was small and controlled. The sort that requires effort. Someone had practised it.

At the top of the first page was written:

ACCOUNT OF THOMAS BELL, SOLE SURVIVOR, SS ARDVRECK. RECORDED 22 NOVEMBER 1929.

I put on the gloves and began reading.

Bell wrote as people often did then. Formal, careful and slightly stiff.

He described the voyage, the weather and the cargo. He described the evening of 16 November clearly and without drama, which I appreciated.

The sea had been calm, he wrote. Unusually calm for November. The kind of calm that made the older crew uneasy, though he did not explain why.

Then he described the sound.

He called it a rhythmic metallic percussion originating below the vessel, consistent in interval but irregular in intensity.

Three beats. A pause.

Three beats. A pause.

He wrote that it continued for approximately forty minutes before the crew went to the rail to look.

Bell did not go to the rail.

Instead, he went to the working deck and climbed into a diving bell that had been staged there for a survey job planned for the following week. He sealed the hatch and remained inside until morning.

He did not describe what happened to the other crew members in any detail.

He wrote:

I did not witness the events directly. I heard them. I will not record what I heard, as I do not believe a written account would be useful to anyone and I have no wish to produce one.

That was the whole paragraph.

Then he continued.

The final two pages were different. Less formal. The handwriting had loosened, as if they had been written later, faster, or both.

Bell described the interior of the diving bell, its dimensions, the hatch mechanism and the way sound travelled through the metal shell.

On the penultimate page was a careful hand-drawn cross-section of the bell with measurements marked beside it.

Bell had been thorough.

In the margin beside the drawing, in darker ink that might have been added later, were five words:

THREE KNOCKS. THEY WITHDRAW.

That was all.

No explanation. No context.

I sat with it for a moment.

Then I photographed the page four times from different angles, making certain the marginal note was legible in each image. I photographed the rest of the document from beginning to end.

What I had found was Bell's sanitised survivor statement, the version he had permitted other people to read. I did not yet know that he had kept a separate shipboard notebook, or that someone would later arrange for it to reach me.

I thanked Jean Mackenzie on my way out. She was reading something and did not look up, which was fine.

I sat in my car and studied the photograph of the marginal note for perhaps three minutes.

Three knocks. They withdraw.

Bell had survived the night by sealing himself inside the diving bell. He had heard whatever happened on deck. At some point before or afterwards, I could not tell which, he had discovered that three knocks forced them away.

He had written it beside a diagram rather than in the body of his account. That meant either he considered it unimportant or he did not want it easily found.

I favoured the second explanation.

I searched for Highland Marine Diving on my phone. They were based in Inverness. They hired equipment, provided HSE-recognised commercial diving support and carried out survey work. Their website was functional but not recent.

I rang the number and spoke to Gavin Munro, who sounded as though he had been awake for several hours and was perfectly content with that.

I told him I needed a full cold-water rig and a dive plan filed for a wreck survey in Loch Ewe.

He asked about my qualifications and recent dive record. I gave him both.

He said he could have the equipment and a 6.7 m Orkney-style wheelhouse boat ready in two days.

I drove back to Inverness that afternoon.

I spent the next two days doing what I do when I am waiting and cannot stop thinking.

I read everything I could find about the SS Ardvreck. I cross-referenced Bell's statement with contemporary reports and tried to determine where the working deck and diving bell would lie after nearly a century underwater.

A survey team had located the wreck in the 1990s. Its position was in the public record. The diving bell had been noted as present and largely intact, with its attachment point corroded but holding.

Someone had photographed it from outside.

Nobody had entered it.

Gavin was solid. He did not ask many questions, which I respected. He checked my equipment twice, which I also respected.

He had a solo-diver policy that normally prohibited what I intended to do. My own qualification and a signed deviation form allowed the dive to proceed, though Gavin made it plain that he considered it a poor decision.

I was not taking anyone down with me.

The wreck dive took place on 23 June.

The SS Ardvreck lay at 34 m, listed perhaps fifteen degrees to port and covered with horse mussels, tube worms and cold-water marine growth. Deep marine wrecks have a particular stillness. Not silence, exactly. Water moving across metal, the distant crackle of life and the sound of your own breathing make silence impossible.

But they feel still.

The working deck was amidships. I found it without much difficulty.

The diving bell remained suspended from the corroded arm at roughly thirty degrees from its original position. Given the wreck's list, that made sense. The hatch faced upwards.

Marine growth covered the exterior, but the shape remained intact. It was smaller than I had imagined from Bell's drawing.

Opening the hatch took several minutes. The mechanism was corroded but had not seized. I worked it slowly until it gave.

The interior was dark, cramped and filled with silt that billowed when I entered.

I waited for it to settle.

My dive light stayed low while the cloud cleared.

Then I saw it.

It rested on the floor of the bell, half buried in sediment. Bronze, judging by the colour visible beneath the growth. Cylindrical. Approximately 26 cm long, with a rounded striking end and a flat grip.

A striker of the sort used against a bell, except it was attached to nothing.

It had been placed there. Left there.

Symbols had been engraved around a 15 cm section of the grip. They were not decorative. Their cuts were too deliberate and their spacing too regular.

I recognised none of them.

I picked it up.

It was heavier than it looked.

I held Thomas Bell's bronze striker at the bottom of Loch Ewe and thought about a man who had survived one night by sealing himself inside this exact chamber. A man who had written five words in the margin of a public statement and hidden them where most people would not look. A man who had left this object behind instead of taking it ashore.

I did not know what the symbols meant. I still do not understand them fully.

I placed the striker in my collection bag and began my ascent.

When I surfaced, I pushed my mask onto my forehead and reached for the ladder.

Callum was standing on the deck, looking down at me.

He was simply standing there.

That was the first thing. He was not moving, waving or doing anything you would expect from someone watching a diver surface after a long bottom time. His arms hung at his sides as he stared down at me in the water.

I stopped with one hand reaching for the ladder because his face was wrong.

Not injured. Not panicked.

Wrong as if he were waiting for something and did not know what it was.

"Callum," I said.

He blinked slowly.

"Hello, Els."

I took hold of the ladder and pulled myself up.

"What are you doing here?"

He did not answer immediately. He watched me climb.

I removed my fins, dropped them onto the deck and began unclipping my buoyancy compensator. My BC. He still said nothing.

The wheelhouse boat had been unattended while I was below, but there was a harbour launch idling thirty metres away. Callum had taken it without permission after reaching the pontoon at Aultbea. He would tell me later that he had been drawn towards my position without knowing the coordinates, following an awareness that behaved more like a bearing than a thought.

At the time, all I knew was that he had appeared on a boat several miles from shore and should not have known where to find me.

The wind across Loch Ewe was cold enough that I was already shivering through the drysuit seals.

I did not care about that.

I was looking at Callum.

"How did you know where I was?"

"I asked," he said. Then, after a pause: "I just knew."

That was all.

No explanation. No mention of tracing the boat hire, speaking to Gavin or seeing me leave harbour.

I just knew.

As if that were a normal answer.

I decided I would return to it. I set down my BC and pulled off my hood.

That was when I saw the mark below his collarbone.

He wore a thin checked shirt, open at the neck. About 5 cm beneath his left clavicle was what looked at first like a cut.

Except it was not a cut.

It was approximately 8 cm long and horizontal, with slightly raised edges. Blood emerged slowly and steadily, but it did not look like a wound needing pressure.

It looked like something that was supposed to bleed.

The surrounding skin was not torn. The edges were clean.

I had seen the slits on the creatures pulled aboard the Mairi Jane. I had opened four of them on the corpse below the visitor centre.

I knew what I was seeing.

"Callum."

I kept my voice flat.

"Take off your shirt."

He obeyed without arguing, which was alarming in its own right.

Callum argues about everything. He once spent twenty minutes insisting that a filled morning roll did not count as a proper breakfast unless it contained both a tattie scone and black pudding.

Now he simply removed his shirt and stood bare-chested in the wind while I examined the slit.

Then I looked at his face.

His pupils were so wide that only a thin ring of iris remained.

Not low-light dilation. Not an ordinary medical response. His eyes were almost entirely black.

It was late morning beneath full overcast, and his pupils should not have looked like that.

That troubled me more than the gill slit.

The slit was physical.

The pupils meant something was running.

I thought about Bell's statement. The figures caught in the Mairi Jane's net. Callum touching one while he tried to free the mesh. The movement beneath its sealed eyes as it turned towards him.

They had made contact, and now they were using it.

I did not say any of that to Callum.

I said, "All right. Put your shirt back on. We are going to Ullapool."

He dressed without asking why. Then he sat on the stern bench and looked towards the water.

I brought the harbour launch alongside, secured it for towing and started the wheelhouse boat's engine.

The passage back took about forty minutes. I watched Callum whenever navigation allowed it.

He did nothing overtly strange. He merely sat there.

Occasionally he turned towards the water and tilted his head, as though listening to something beneath the engine noise.

I increased the throttle and tried not to think too carefully about what a living relay meant in practical terms.

If the creatures could track me through him, they knew exactly where I had been.

They knew about the wreck.

They probably knew about the diving bell.

The bronze striker was in the collection bag inside my drysuit pocket. I kept one hand against it for most of the way back.

Mairi Sutherland was waiting outside the harbourmaster's office when we berthed in Ullapool.

I had called over the VHF set, and she stood at the pontoon, watching us come in. She took one look at Callum and said nothing. She simply held open the office door.

The room was small and smelt of coffee and diesel. A VHF set on the desk crackled continuously, and a portable heater ran in the corner despite it being June.

I put Callum in the chair beside the window. He sat without complaint and looked across the harbour.

"Right," Mairi said.

She folded her arms.

"Talk."

So I did.

I laid it out in the order it had happened, which is the only sensible way to handle something with too many moving parts.

I began with the forum images, the crew at the Harbour Cafe and Iain MacLeod's account of the tangle net. I told her about Callum touching one of the figures and about the sealed eyes turning towards him.

I described the corpse on the shore, the four slits on either side of its ribcage, the calcified nodules and what I had found when I opened the tissue.

I watched her face while I spoke about the dark fluid.

She did not flinch.

At the time, I took that to mean she had already been considering the same possibilities. I did not know that the fluid on her boots had strengthened a link established years before.

Then I told her about Thomas Bell, the Gairloch Heritage Museum archive, the survivor statement, the diagram of the diving bell and the five words in the margin.

Three knocks. They withdraw.

I placed my mobile phone on her desk and showed her the photograph.

She bent closer and studied it for a long time.

"1929," she said. "The SS Ardvreck went down on 16 November. Loch Ewe."

She straightened.

"And you dived the wreck this morning."

I reached into the collection bag and placed the bronze striker on her desk.

It struck the marine chart beneath it with a solid metallic thump.

Mairi stared at it but did not touch it.

"Bell left that inside the diving bell," I said. "It has been there since at least 1929. Possibly longer."

She was silent for a moment.

Then she pointed towards the engraved grip.

"Those symbols?"

"I do not know what they are," I said. "I photographed them."

"I haven't found a match yet."

Mairi looked at Callum. He was still watching the window. His pupils were still wrong, so wide that only a thin ring of iris remained.

She looked back at me. "And him?"

"They made contact through the net. I think they've been using him as a relay since then. Tracking me through him."

I paused.

"He couldn't explain how he knew where the boat was. He just knew. And the gill slits appeared."

"When?"

"I don't know. Sometime in the last few days."

Mairi pulled over a chair and sat opposite me. She had a legal pad on the desk. She picked up a pen, wrote something and turned the pad towards me.

"How far along?"

I didn't know. That was the honest answer. I didn't know what the stages were, how quickly it progressed, or whether "far along" was even the right way to think about it. I shook my head.

She wrote another question.

"Can he hear us?"

I looked at Callum. He had not turned from the window.

"Callum," I said quietly. "What can you hear just now?"

"The water."

We were indoors, with the VHF set murmuring, a space heater running and the ordinary noise of Ullapool harbour outside. No water was audible in that room.

Mairi capped her pen. She didn't write anything else.

I told her I needed her to keep Callum there under observation whilst I worked out what the symbols meant and what the striker's signal actually did, as opposed to what Thomas Bell had claimed it did. I told her she was the only local contact I had who had already been briefed and had enough authority around the harbour to manage matters quietly, without triggering a full agency response that would either bury everything or make it worse.

She said she could do it.

She had a back room used during storm-season call-outs, and Callum could stay there. I said that would work.

I trusted her completely. I want to be clear about that.

Looking back, it wasn't carelessness. She had been solid at every stage. She had taken the forum photographs seriously when I first contacted her. She had stood with me on the shore when the figure washed up. She had helped me keep everything contained.

There had been no reason not to trust her.

I left Callum with Mairi and drove back to the motel on Shore Street. I sat on the edge of the bed with the bronze striker in my hands and examined the markings beneath the bedside lamp.

I still didn't know what they meant. I turned it over several times. There were twelve symbols, perhaps fourteen, cut cleanly and deeply into the metal around the 15 cm grip. They were old and deliberate. The whole striker was only 26 cm long, but it was heavy enough to pull at my wrist.

I placed it on the bedside table, lay back and stared at the ceiling.

Callum had said, "The water," as clearly as anything. No hesitation.

I held on to that thought and did nothing useful with it. I simply kept turning it over. The striker remained on the bedside table. I watched the ceiling and waited for an answer that didn't come.

At 02:47 on 24 June, I realised I had not actually been asleep. I had been lying on the bed, staring upwards, with my boots still on and the striker beside me.

That's me. I can't wind down.

I had been repeating the symbols in my head as if familiarity might decode them, which is not how such things work, but I kept doing it anyway. I got up, used the bathroom and checked my mobile phone. Nothing from Callum. Nothing from Mairi.

I decided that was fine. I decided they were both asleep.

I am not sure what made me drive back. Some version of "I should check", probably. I do that sometimes.

Not often enough, if I am honest, but sometimes.

I picked up the striker and slipped it into my jacket pocket out of habit, then drove towards the harbour.

It was cold. February cold, although it was late June. The Minch can do that. Air coming off the water has a particular flat weight to it, the sort that finds its way through your jacket regardless of what the label claims the jacket can withstand.

I parked near the harbourmaster's building and walked round the side towards the fishing pier.

That was when I saw her.

Mairi Sutherland was standing waist-deep in the Minch.

She had no jacket and no boots. She was still wearing the work clothes she had worn earlier, heavy trousers and a grey thermal top. She faced out into the darkness with the water at her waist and her head inclined at perhaps thirty degrees, as if she were listening to something beneath the surface.

I stopped walking.

I called her name twice.

She did not move.

I stood on the shore for perhaps ten seconds. It felt longer. The water was black and flat. There was no wind. Lights shone from Ullapool harbour, throwing strips of orange across the surface, but not enough to reveal much.

Mairi was only a shape in the dark water.

I went in after her.

The cold struck my legs and kept climbing. I am not going to dwell on it. It was bad. I waded quickly because moving was easier than thinking about it.

When I reached her, I seized her arm and said her name again, close to her ear.

Her head rose slowly.

I moved in front of her and looked at her face.

That was when I saw her eyes.

They were entirely black. This was not what had happened to Callum, whose pupils were simply far too large for the available light. Mairi's eyes were black across the whole visible surface, iris and everything. They reflected nothing. They looked like two holes.

That was difficult to file away.

I filed it away anyway.

I pulled her towards the shore. She did not resist, but she did not help. She was simply weight. Her feet found the bottom and she walked when I moved her, yet there was no sense that she was present.

I got her on to the bank. She remained standing, just barely.

Then she spoke.

I don't know what language it was. I am not sure language is the correct word. It was a sequence of sounds, some of them consonants and some of them not, delivered in a steady rhythm for perhaps six or seven seconds.

She wasn't shouting. She wasn't calling to anything. She was finishing something she had begun beneath the water.

The bronze striker was in my jacket pocket.

I drew it out and held it beneath a harbour light. I looked at the symbols cut around the grip, and I knew.

I did not know their meaning. I could not read them. But the sounds Mairi had made and the marks engraved in the bronze belonged to the same thing. The same source. The same system.

I was certain in the way one can be certain of something that cannot yet be proved.

Then she collapsed.

I caught most of her weight. We both went down on the bank, with her partly on top of me. I rolled her over and checked her breathing. She was breathing. Her eyes were closed.

I called her name and slapped her cheek. Not hard. Just enough.

She made a sound. Her eyes opened, and they were pale blue again, their ordinary colour.

She looked at me, then at the water, then back at me.

"What happened?"

It did not sound entirely like a question. It sounded as though she were running a diagnostic check.

"You were in the water," I said.

She looked down at her soaked trousers.

"I was in the water."

"Yes."

For a moment she said nothing. I watched her face. She was taking inventory, working backwards and finding a blank space.

"I don't remember going in."

"I know."

That was when I understood what I had done.

Not pulling her out. That had been the right decision.

I mean what I had done earlier, sitting opposite Mairi and taking her through everything. The locations where the creatures had been found. Bell's account. The striker. Callum's exposure. All of it.

I had believed I was briefing a reliable contact. In fact, I had been sending information straight back to whatever had already colonised her.

She had been a receiver for years. The dark fluid from the corpse's four sealed gill slits had soaked the sand around her boots during our examination on the beach, but it had not infected her there. It had merely reawakened or strengthened a link that was already present.

I had handed her everything I knew, and she had transmitted it whilst standing waist-deep in the Minch at 03:00 with her eyes turned black.

I did not say any of that to her. She was still on the ground, I was soaked through, and there was no point.

Then I heard movement in the water.

Not waves. Not a boat.

Something surfacing.

It was the sound of water being displaced from below, the particular weight of something large rising through it.

It came again.

Then a third time, from another direction.

Three separate points, all close to the harbour and fishing pier.

I stood. The nearest pontoons were roughly 365 m away. I could see the dock lights, the shapes of boats in their berths and perhaps fifteen fishing vessels moored overnight, give or take. Crews were sleeping below deck.

Three of the pale creatures were between me and those boats.

In Bell's private notebook, he had called them sleepers, because they remained in the deep channels for years between their emergences. That was the term I had begun using too.

I had the striker in my hand.

Bell's note said three knocks. I did not have the SS Ardvreck's diving bell. I had a bronze striker, a steel harbour railing and an approximate memory of the marginal instruction.

The striker did not need its original bell. Bell's diagrams had made that much clear. Three evenly spaced impacts against resonant metal reproduced the command.

That was all I had.

I ran.

The pier was wet, and I nearly fell twice. At the first fixed section I caught hold of the heavy steel-pipe railing beside the main approach. I struck the bronze against it three times, with even spaces between the blows. Not fast. Not slow.

The sound rang flat and metallic across the water.

Two sleepers convulsed.

I saw it happen. Their pale shapes, perhaps 18 m out, went rigid and then dropped beneath the surface. It was not graceful. They simply fell, as if whatever held them up had released them.

The water closed above them. They were gone.

The third kept moving.

It was closer to the fishing vessels than the others had been, already inside the harbour approach and advancing slowly across the surface. The dock lights showed enough of it for me to judge its length at about 1.86 m, perhaps slightly more. It was pale and narrow.

It wasn't fast.

It didn't need to be.

The nearest vessel was perhaps 9 m away.

I struck the railing again.

Three evenly spaced beats.

I heard Callum before I saw him.

A harbour launch had come alongside farther down the pier without its navigation lights. Callum must have taken it after Mairi left him. Drawn through the link, he had followed her to the water and then followed me, or followed the sleepers' awareness of me, out to my position.

I didn't know he was there until he gave a short, sharp exhalation.

I turned.

He was standing perhaps 9 m behind me. His whole body convulsed. Both hands flew to his sides and his back arched. Then he straightened, turned towards the water and walked off the end of the pier.

There was no hesitation. He made no sound when he struck the surface.

The water closed over him without a splash, which is not how water behaves when a person falls into it. That detail lodged in my throat and stayed there.

I ran to where he had gone in.

The pier ended. Below it there was only black water, broken by orange shapes from the harbour lights.

I stood at the edge with the striker in my hand and looked down.

There was nothing to see.

The third sleeper was still moving towards the boats. I could hear it in the water. The sleeping crews were 9 m away.

Callum was somewhere below the surface.

I didn't move.

The sleeper was perhaps 6 m from the nearest fishing vessel. I could hear the sound it made. Not splashing, exactly. More like the pressure of something displacing water that did not want to be displaced. Low and steady.

The crews were asleep. Nobody was on deck. Nobody was watching.

Callum was under the water.

I knew what the three-strike signal did. I had watched the first signal force two sleepers to withdraw. I had seen them convulse and drop into the Minch as if their strings had been cut.

Then I had watched the second signal seize Callum. His back had arched, his body had straightened and he had walked into the water as though obeying an instruction.

I knew that another signal would force every nearby sleeper and every human conduit bound to them to withdraw again. I knew what it might do to Callum if he was still alive below the surface.

If there was still something there to do it to.

That is the part I cannot consider for long.

I did not know whether he was alive when I made the decision. I still don't know.

I have turned it over perhaps a thousand times, and I always arrive at the same place. I don't know. Not knowing is what I have to live with.

I struck the railing.

Three beats. The same rhythm.

The bronze was warm in my hand from the previous blows. It rang against the steel and sent the signal across the water.

The third sleeper stopped moving.

It simply stopped.

Then it went under.

The water settled over it, and that was all. The pressure sound vanished.

The Minch became quiet in the way it can at 03:00 when there is no wind, a complete sort of quiet in which the only sound is boats creaking against their lines.

I stood at the end of the pier for a long time. I don't know how long. Long enough for the wet boards to chill my feet through my boots.

I kept looking at the place where Callum had gone in. It was pointless. There was nothing to see except the orange reflections of the harbour lights and black water underneath them.

He did not surface.

I waited.

I am not certain what I expected. Part of my mind was calculating how long a person could remain underwater and still be brought back. The figures were not good. I knew that, and I waited anyway.

That's me.

I will stand on the end of a pier in the cold for forty minutes because I cannot work out what else to do.

Eventually I walked back towards the car park. I still had the striker. There was nowhere to put it, so I carried it in my hand.

Mairi was sitting near her battered Land Rover pickup where I had left her, her back against the rear tyre. She looked at me, then at the pier, then back at me.

"Where's Callum?"

I didn't answer.

She understood from that. For a minute she said nothing.

Then she said, "I'm sorry."

I nodded because I had nothing to give her in return. The word "sorry" did not land anywhere useful. It simply remained between us.

The following days were administrative in a way that felt entirely insane after what had happened.

But that is how such things go. The world does not stop for you.

Callum had joined Iain MacLeod's crew aboard the Mairi Jane three weeks before the catch. He was twenty-six. He had started working informally, helping with the creels and deep-water monkfish tangle nets, the way Callum did most things. His name had not yet been added to the crew list or the vessel's employment records.

That did not prevent me from reporting him missing. Police Scotland accepted the report when I went to the station in Ullapool on Market Street. The officer spent about twenty minutes taking the details and asked where Callum had last been seen.

"On the fishing pier," I said. "He went into the water."

"At what point?"

I gave him the berth and showed him the section of pier on a harbour plan.

He asked whether Callum had fallen, whether anyone else had witnessed it and whether I could identify a likely search area beyond the pier. I could not tell him about the launch, because it had been returned to its berth before daylight and its movement log had disappeared. I could not explain the creatures. Mairi said she remembered nothing after leaving her office.

The police accepted Callum as missing, but without a reliable last-known marine position, launch record or corroborating witness, they said HM Coastguard could not define a wider search area in the Minch. A local shoreline and harbour search began, then narrowed. Correspondence from the harbour office and the Marine Directorate arrived quickly afterwards, stressing that Callum had not been listed aboard the Mairi Jane and that there was no evidence of a casualty beyond the harbour limits.

The search was closed far sooner than it should have been.

At the time, I thought that was bureaucracy. Later, I understood it as concealment.

I returned to the motel on Shore Street and sat on the edge of the bed.

The striker was on the bedside table, wrapped in a hand towel from the bathroom. I did not want to look at it, but I did not want to place it anywhere beyond my reach either.

So that was where it stayed.

A week later, Fiona Grant, a NatureScot coordinator attached to the fictional Summer Isles Marine Reserve visitor centre above the shore near Ullapool, telephoned me. She said a seasonal fisheries observation post was becoming available in quarters near Rubha Reidh Lighthouse. The work involved monitoring deep-water movements, logging acoustic events and providing liaison reports for the marine reserve programme.

She said my name had been put forward.

She said it as if she were reading from a prepared note.

I asked who had recommended me.

She said she did not have that information.

I accepted because I had nowhere else to go and because Rubha Reidh faced the Minch. I was not finished watching the water. That felt like a reason.

Around the same time, the Scottish Government Marine Directorate sent a letter resolving my suspension. There was no explanation and no review meeting. It merely stated that the matter opened on 12 February 2026 had been closed and that my credentials were reinstated pending reassignment.

Months of professional limbo, beginning with my suspension in February and my withdrawal from work in March, ended with a form letter.

I placed it in the folder with everything else and thought little about it.

I should have thought about it more.

By August I was living in the seasonal observation quarters near Rubha Reidh Lighthouse. That was where a NatureScot courier in a dark green waterproof delivered Thomas Bell's private shipboard notebook from the SS Ardvreck.

It was not the sanitised survivor statement Bell had donated to the archive at Gairloch Heritage Museum. I had already read that account. This was the document he had kept for himself.

There was no explanation of where it had come from or who had sent it. The courier handed me a padded envelope bearing my name and left before I thought to ask.

I read the whole notebook in one sitting at the desk beside the window.

That was when I found the recent correspondence folded into the back pages.

The first document was a four-year-old letter from Mairi Sutherland. It did not refer to my February report, because that report had not existed then. Instead, it established a standing protocol: any account of pale bodies, unexplained acoustic activity or net entanglements in the deep water west of Isle Martin was to be contained locally and withheld from general circulation until cleared through a named contact in the Marine Directorate.

A second, later exchange showed that the protocol had been applied to my own February 2026 report, the one that had led to my suspension.

I sat with that for a while.

The sleepers' management of their exposure had not begun three weeks before the catch, when Callum touched the figures caught near the weighted end of the Mairi Jane's monkfish tangle net. It had not begun when the photographs appeared on the Deep Water Watch forum under MinchAngler74.

It had been operating for years.

Mairi had been part of it for years.

I had contacted her on the morning of 19 June, after arriving in Ullapool, because I believed she was the only local official prepared to take the photographs seriously. I had handed her everything. I briefed her on the wreck, Bell's account, Callum's exposure and the bronze striker. I told her where I was going, what I had found and what I thought it meant.

I had considered her a reliable, contained resource.

That was the phrase I used in my own head.

Reliable, contained resource.

I am not good at reading people. That is something I know about myself and apparently need to keep learning.

The black fluid from the dead sleeper's gill slits had soaked into the shore around Mairi's boots during the examination. I had treated it as incidental. It was not the cause of her compromise. Her letter proved the connection was much older. The fluid had only strengthened something dormant and allowed it to take fuller control.

I had been wrong about many things.

I put the letters on the desk beside the bronze striker and looked through the window towards the Minch. It was a clear afternoon. Light played on the flat water in a way that made it appear harmless.

It always looks harmless.

Bell's notebook remained open in front of me. The final entry in his hand was a single line at the bottom of the last page, written more tightly than the rest, as though he had almost decided not to include it.

"The bell does not stop them. It tells them to wait."

I did not close the notebook.

I had been sitting there for perhaps twenty minutes since reading that line. The striker lay 15 cm from my right hand, its bronze dulled in places by being handled too often.

I kept refusing to touch it.

I wasn't sure why. Perhaps I did not want to lift it and feel how ordinary it was. It was a small thing. Heavy for its size, but small enough to hold in one hand.

I kept thinking about that. Something so small had done what it did on the pier, and using it had cost what it cost.

The Minch was flat beyond the window. Late afternoon was giving way to evening, and the light had gone gold and quiet, making it seem impossible that anything in the world could be wrong.

I had been at the Rubha Reidh observation quarters for just over a week. NatureScot had given me a bedroom, a small kitchen, a desk and a bathroom with a shower that took about four minutes to become warm.

The notebook had arrived two days earlier. The courier in the dark green waterproof had knocked, handed over the padded envelope and left. There was no return address and no note inside, only Bell's notebook wrapped in acid-free tissue paper. That was a specific choice. Whoever packed it knew what they were handling.

The archived account at Gairloch Heritage Museum had been careful. Bell had been careful.

But the notebook was not the same document.

The archive held the version he had allowed other people to see. The notebook held the version he had written for himself. Or perhaps for whoever came after him, although he had never quite committed to that either.

You could feel him withdrawing every few pages, writing something and then manoeuvring around it. The margins were fuller than those in the archived statement. There were more diagrams and more annotations in his cramped, deliberate hand.

He had been a precise man. Precise and frightened, and uncertain how much to say.

The SS Ardvreck had been lost on 16 November 1929. Bell, its sole survivor, had first recorded his account on 22 November 1929. He had survived by locking himself inside the diving bell on the crane deck and remaining there until morning.

He wrote about the knocking from beneath the seabed before the creatures surfaced. Three metallic blows, repeated at measured intervals. He wrote about the crew. He wrote about what the sleepers had done to them.

I am not going to reproduce that part. Writing it again would help nobody. Some things you read and then simply carry.

The emergence timeline was stated more plainly in the notebook than anywhere in the archived account. Bell did not write that the sleepers might surface at intervals. He wrote that they surfaced on a seven-year cycle.

He had identified the cycle through recurring deep-water acoustic events recorded in local ship logs. In each case crews had reported three knocks from below, unusual net damage, missing men or pale bodies briefly seen at the surface. Bell cross-referenced two earlier events and calculated the interval in the margin with the neat arithmetic of a man determined to prove himself wrong.

He had not been wrong.

The June 2026 emergence was the latest event. The three figures in the Mairi Jane's net. Callum touching them in the water. The dead sleeper on the shore. The roughly 45 m sonar return moving against the tidal flow along the deep channel west of Isle Martin.

That was when the seven-year clock began again.

I wrote the date on a pad and stared at it.

Seven years sounds like a long time until you consider how quickly the previous months passed. I was suspended on 12 February. I withdrew from work in March. The forum post appeared at 02:47 on 18 June. I reached Ullapool on 19 June. The archive research, the 34 m dive to the SS Ardvreck and the harbour confrontation all followed within days.

Now it was August.

That is how quickly time moves when you are not watching it.

I turned back through the notebook without searching for anything in particular.

Beside Bell's diagram of the diving bell was the marginal instruction I had already seen in the sanitised statement:

"Three knocks. They stop."

But the private notebook continued.

"Stops them for a time only. They do not leave. They wait below.

"I have not found what ends them, if anything does. I have found only what makes them pause."

That was what Bell knew and had chosen not to state plainly in the version he gave the archive.

Now I understood why.

Stating it plainly meant admitting that the signal worked. It meant explaining that three evenly spaced impacts against resonant metal forced nearby sleepers and their human conduits to withdraw.

And using it cost something.

The cost was not abstract. It was specific and permanent. It had a name.

Had a name.

Callum.

I had not spoken his name aloud since the night on the pier. I don't know whether that was avoidance or simply because there was no one at Rubha Reidh to say it to.

The observation quarters were quiet. The headland was mostly quiet. A NatureScot maintenance team came by twice a week. They were friendly enough. I had held exactly two conversations with them, both concerning the water heater.

That was fine.

I am not particularly good at those conversations either.

I closed the notebook but did not put it away. I left it on the desk.

As the light beyond the window turned gold, I kept thinking about Mairi. Not the Mairi who stood waist-deep in the Minch at 03:00, eyes black, speaking in sounds that matched the symbols on the striker. I had processed that version of her, more or less.

I thought about the other Mairi. The one who answered my call when I arrived in Ullapool. The one who met me on the shore and held a torch whilst I measured the 1.86 m corpse, photographed the four sealed slits on either side of its neck and recognised that they were gills.

The one who listened as I explained everything: the wreck, Bell's account, the striker and Callum.

I had believed she was a reliable, contained resource. I had used that phrase and felt pleased with it.

But she had written to establish the Isle Martin suppression protocol four years before I drove north. Later correspondence showed that the same machinery had buried my report and helped create the grounds for my suspension.

The colonisation had not begun three weeks earlier with Callum touching the bodies in the net. It had been operating for years. Mairi had been in position, and the sleepers had been managing their exposure throughout.

I travelled to Ullapool believing I was ahead of the situation.

I was the last person to know what was happening.

I am not good at reading people. I have known that for years. I am good with data. I am good at finding patterns in data.

People are a different kind of pattern, and I miss things.

I missed Mairi completely. I gave her the whole picture and congratulated myself on efficient use of a local resource.

I was giving them a map.

The Marine Directorate letter was still on the desk beside Bell's notebook. My suspension had been resolved quietly, the way matters are resolved when someone decides it is easier to bring you inside the structure than to keep explaining why you remain outside it.

The seasonal post and the reinstatement were not coincidences. They were not rewards. The compromised network had placed me at Rubha Reidh because it could monitor me there, control what I reported and make use of my observations when the next deep-water event began.

I had not yet answered the proposed longer-term reassignment. I wasn't certain what I would do.

The fisheries observation post was real. It came with real surveys, acoustic logs and reports, and I completed them. I also sat at the desk every evening, looking across the Minch and thinking about seven years.

The water outside had darkened. The gold was gone, and the surface had become the deep blue-grey it takes on during the hour before night.

There was no wind.

From the quarters I could see a long way across the water. Nothing disturbed the surface.

I picked up the striker and turned it in my hand. The symbols remained unreadable, lines engraved around the grip.

I had taken forty-three photographs of them and sent selected images to three people from a linguistics contact list I had assembled years earlier for another project. None had replied. I was not certain they would.

Bell had known the cost of the signal. He had survived the SS Ardvreck by using it from inside the diving bell on the crane deck of a sinking vessel in 1929. Then he had spent the remainder of his life writing around the truth.

When I first read his archived statement, I thought that was cowardice.

I no longer did.

He wrote obliquely because plain language would have required him to explain the cost. Explaining the cost would have meant allowing someone else to understand that it was real and specific, and that one day they might be the person required to pay it.

He had chosen not to put that burden on anyone else.

I understood that now. I wasn't sure I agreed, but I understood.

I placed the striker back on the desk. My hand rested on it for a moment before I pulled away.

Seven years.

Bell's notebook said seven years. The arithmetic was clean, and Bell had been right about everything else.

I had the bronze striker. I had his notes. I had the records of the recurring acoustic event.

I had everything except the one thing I possessed on the pier that night and did not understand I was spending until it was gone.

I knew what forcing the sleepers to withdraw could cost. I knew it in a way that would not fade.

The Minch lay dark and still beyond the window. There were only a few mainland lights in the distance. Nothing moved on the surface.

It did not look as if it were waiting.

It looked like water. Flat, cold and entirely indifferent to anything I thought about it.

But Bell had done the calculation, and Bell had been right.

The clock was running.

I left the notebook on the desk. I left the striker beside it.

Then I went into the kitchen and made coffee, because it was going to be a long night.

And I had six years and fifty-one weeks to decide what I would do when the water stopped looking still.