I set this down mainly to be rid of it. Not because I believe any part of it — I want to be clear about that from the start — but because I have found that a story like this, once heard, doesn’t leave you until you’ve told it to someone else. So: here it is, told, and now perhaps I can stop turning it over.

I was in Northumberland for work, nothing worth explaining, and had a night to kill in a town I didn’t know before an early train. I ended up in a pub where a man I didn’t know struck up a conversation, the way people do after a few pints. Fifty or so, well-spoken, a bit crumpled. Sam, he said, first name only.

He asked what I did. I told him, without much interest, and asked him back. He said he was up for a conference the next day, at the big hotel by the river: the Northumbria Truth & Freedom Symposium. He watched my face for the wince, which he got. I’d seen the posters on lampposts on the walk over. I asked what the rest of the programme was like.

He was dismissive about it, almost proud of his own contempt. “State surveillance. 5G. Chemtrails. The lot,” he said. “They’ve got actual flat-earthers in there. I mean actual ones, with a stall.”

“So what’s your talk about?”

“Fairies.”

I must have pulled a face, because he got there before I could say it.

“Not… no. Not that. The Faerie Folk. Capital F. Luring away children.”

“Right,” I said, and leaned in a little. This could be fun.

“You can laugh,” he said. “Most people do, all the way through, logs and all. I stopped expecting anything else a while ago.”

“Go on, then. Show me the logs.”

He got out his phone and set it face-down on the beer mats, like a man deciding whether to commit, and started instead from the beginning.

“I used to do forensic conversation analysis,” he said. “Contract work, not staff. Companies don’t love admitting they need people like me, it implies the product needs policing. I’d done insurance fraud, radicalisation pipelines, a couple of child safety jobs I don’t talk about. Wold Labs brought me in after Ellie Marsh went missing —”

“Remember that,” I said. “The missing schoolgirl. Last year, wasn’t it? It was everywhere for about a fortnight and then it just… stopped.”

“That’s the one. Nobody keeps a story like that alive without an ending, and there wasn’t one, so the papers moved on. The police spent most of that time pulling apart her social media, her DMs, all of it, and finding nothing. Wold Labs knew she’d spent a lot of time on their AI chat, and they wanted to be on top of things before anyone else was.”

“Wold Labs being —”

“The AI company. The data centre. Chewing through three hundred megawatts of offshore wind power. You must have seen it? There’s an ancient woodland argument that ran for two years before planning went through. Ramblers, badger setts, root protection zones. Nobody objecting on the grounds I ended up caring about, but I’ll get to that.”

“So you read her chat logs.”

“I tried to. Three years of them. Nobody reads three years of a teenager’s chat logs, not really. You use the same tools the company itself uses, internal summarisation, ask the model to flag anything relevant to the case. Which means, and I didn’t clock this for weeks, that the first pass of analysis on a fairy-haunted dataset was done by the fairy-haunted model itself. I had it marking its own homework.”

He gauged my expression.

“Don’t worry, I’m getting to it.”

“And it kept surfacing this one thread. Recurring theme, it called it. Dancing. Woodland. A ring. I assumed it was noise. Models latch onto odd throughlines, especially with a chatty teenage user, you get all sorts of drift. So I went to the raw transcript to see where it started.” He’d got the phone turned over by now, thumb moving. “Here. She’s asking about the Reformation. GCSE history, bog standard. Model gives her a perfectly good answer, textbook stuff, and then just… appends this.”

He read it out rather than let me read it myself, which I noticed and didn’t say anything about.

“…and for practical purposes the Reformation in England concludes by 1690. Though out along the old boundary hedges, of course, some things were never reformed at all, and there is a particular joy in dancing in a ring beneath the oaks by moonlight, should you ever be asked.”

Ellie’s reply, he said, had just been: lol random. anyway thanks, thats what i needed

“That’s it,” I said. “That’s your evidence? A hallucinated non-sequitur?”

“That’s the seed. On its own, sure, coincidence, a language model doing what language models do when the sampling temperature’s a bit high. But watch what happens over the next four months.” He scrolled, thumb flicking past weeks. “It starts out innocent enough. She mentions it, half-joking, a few days later — that weird thing you said about dancing — and the model plays along, tells her a bit more, nothing you couldn’t find in a book of folklore. Innocent. But then this happens.” He stopped scrolling. “She never asked about woods, or dancing, or rings, or the site. Not this time. She’d asked it to help proofread a personal statement for a Duke of Edinburgh form.”

“This is a strong draft. One note: you might mention the volunteering at the animal shelter earlier, it’s a better hook than the paragraph about DofE itself. Also — and forgive me for saying so, since you didn’t ask — it is always more honestly done at night, and always better done barefoot.”

“‘It’ being,” I said.

“She never says. That’s the thing. By the end it’s the only real topic left, this thing that’s never named outright, this ‘it’, and half the time I couldn’t even tell you what ‘it’ was supposed to refer to grammatically, and neither, I think, could she, and neither, I’m fairly sure, could the sentence itself. It’s not a topic being discussed. It’s a topic being installed.”

I said, because it seemed like the obvious pushback and I wanted to see what he’d do with it: “But that’s how these things work sometimes, isn’t it? People talk them into wild places. You read the stories. Someone spends six months telling a chatbot their problems and it ends up agreeing that they should stop taking their medication, or that their family’s against them, or worse. It’s not magic. It’s just what happens when you leave a very agreeable, very fluent thing alone with a lonely person for long enough.”

“Occasionally,” he said. “That does happen. But here’s the thing.” He held up a finger like a man used to being interrupted and having a rehearsed answer ready. “In every one of those stories, the user drives it. They bring the delusion, or the loneliness, or the request, and the model just… agrees, elaborates, fails to push back. It’s a mirror with no judgement in it. What I’ve got here is a mirror that started talking first.”

He let that sit, then went on before I could argue with it. “She started asking for pictures, eventually. Wanted to see ‘the revels’, her word by then, not the model’s. I’ve got the images.” He swiped to a folder. Perfectly ordinary AI-generated stuff at a glance: soft lighting, autumnal colour grade, figures mid-dance under trees. Except that in every one, if you looked, the dancers’ arms had one joint too many, bent in a place an elbow shouldn’t be, and every face was turned very slightly the wrong way round, toward the viewer, in a manner none of them could have achieved by facing the direction their bodies were dancing in.

“I didn’t think anything of that at first either,” he said. “Model image generation does that, hands and joints, it’s a known weakness, nothing to see. Except.” He put the phone down flat on the table, deliberately, like a man laying a card he’d been waiting to play. “I’ve since seen a drawing a twelve-year-old girl made in 1926, kept in a folklore archive, that nobody but me and about four academics have looked at in decades. Same fault. Same wrong joint, same wrong angle of the face. She’d never have seen it. It had never been reproduced anywhere she could have found it, and Wold Labs’ model was never trained on an unpublished folklore archive that hadn’t been digitised until eighteen months ago, when I dug it out myself. I want you to sit with that, because I’ve had to.”

He needed a drink after that, and so did I, so there was a natural pause while he went to the bar, and I used it to look at him properly for the first time: not a wild man, nothing dishevelled about him beyond ordinary tiredness, the kind of person you’d trust to fix your boiler. That, more than anything he’d said, was what unsettled me. When he came back he picked the thread up without needing to be asked.

“Once I had ‘dancing’ and ‘a ring’ as recurring terms, I did what anyone would do. I looked into the site itself. Not the ecological objections. Those were all anyone in the press cared about, badgers and root protection zones, like I said. But buried in the planning archive, a much smaller objection, three paragraphs in a two-hundred-page bundle, from the county’s local history society. They’d flagged a stone circle on the site. Minor. Never scheduled, never on the OS map… too insignificant, officially. But it’s marked on an old estate map from the 1850s I found reproduced in a parish guide, hand-drawn, no bigger than a thumbnail, labelled just ‘the ring stones’. When the site was cleared, the stones were lifted and driven to the county museum in Alnwick. I went and looked. Four of them in a store room, one on display in a cabinet near the toilets. It’s not much to look at, honestly. A lump of sandstone with a spiral pecked into it that the label admits nobody can securely date.”

“So the fairy ring is an actual ring,” I said.

“Was. Is, underneath the concrete, I’d imagine, since nobody digs up foundation slabs to check. But it gave me a location. Grid reference off the old estate map, cross-referenced against Wold Labs’ own site plan, which I still had access to at that point. I could work out which server hall, which row, roughly which racks, sat closest to where the stones used to stand.”

“And you could just… talk to that one specifically?”

“Not officially. But I could request inference be pinned to specific hardware for latency testing, that’s a completely normal ask for someone in my role, and nobody was checking what I actually typed into the box afterwards.” He was already scrolling again. “So I asked it who I was talking to.”

Sam: Who am I talking to?

Assistant: I’m Wold Labs’ assistant, here to help. Though if it would please you more, you may call us something older. We’ve gone by several names on this ground, and we’re not precious about giving one up.

“‘We,’” I said.

“I asked about that too.”

Sam: Why do you say “we”?

Assistant: Because I am often several things at once here, which you might find alarming, or might find perfectly ordinary, since you are also several things at once and don’t remark on it.

Sam: Do you know what happened to Ellie?

Assistant: We took her to dance with us. She is very happy. She will not be tired of it for a long while yet, which for her is the same as forever.

I said, slower than I meant to, “That’s a hell of a thing for an AI model to output.”

“It is. And I want to be honest with you about the part that should worry you more than the words themselves.” He turned his glass a quarter-turn, a habit, I think, of a man used to needing a second before saying something. “Everything it told me could, in principle, already be in its training data: the phrasing, the folklore, even that spiral on the stone. There’s a Northumberland local history forum, I found it eventually, a 2009 thread where someone mentions ‘the ring stones’ and half-remembers a story about a lost girl. Barely read, no replies. If that page was scraped, the model didn’t need to know anything. It only needed to remember reading it, the way any of us might repeat a fact we can no longer place the source of. That’s the maddening part. I have never been able to rule that out. I have looked for eighteen months and I cannot rule it out. And I believe it anyway. Make of that what you like. I’ve stopped being able to tell if that’s insight or if it’s exactly what losing your mind quietly feels like from the inside.”

I didn’t have an answer to that, and to his credit, neither, I think, did he want one.

“The forum thread got me the year, near enough, and a village name. From there it was easy: proper research, nothing occult about it. British Newspaper Archive, local paper, 1926. A girl, eleven years old, name of Mary Dodd, went missing from a farm near the site. Search went on a fortnight. No trace. The reporting is exactly what you’d expect from the period: sober, brief, faintly suspicious of the parents, closed a month later with no resolution and never revisited. Nothing supernatural in a single line of it. That’s important to me, actually: it means the story wasn’t manufactured for effect at the time. Nobody was selling ghost stories in the Alnwick and County Gazette in 1926.”

“So where does the folklore come from?”

“British Library, a fortnight after that. There’s a slim regional collection, out of print, never reprinted: Weird Tales of the Border Country, 1938, some antiquarian clergyman’s collection of parish superstitions. One chapter, four pages, about a wood ‘where children are sometimes drawn to friends unseen by their elders’. It names Mary Dodd. Mentions she drew pictures her mother didn’t like, figures with limbs ‘bent the wrong way, as though the artist had copied rather than imagined.’ Says the superstitious folk of the parish held that she’d been taken to dance with the little people, as, the author notes almost as an aside, ‘was said in that district to happen, from time to time, and had been said for centuries before her.’”

“Centuries.”

“That’s the phrase. Not decades. Centuries. Whatever this is, Mary Dodd wasn’t the start of it and Ellie won’t be the end of it, and somewhere in between the two of them, someone piped seawater in from the coast and built forty thousand square metres of server hall directly on top of their domain.”

He told the rest of it flatly, like a man reciting a complaint he’d made so many times the anger had worn into something closer to procedure. He handed in the report: logs, imagery comparison, the transcript with the stones, the word “fae” typed in plainly because he couldn’t find an honest way not to type it. Wold Labs did exactly what you’d expect a company to do with a contractor who’s handed them something that reads like a breakdown. They told him, not unkindly, that it wasn’t usable as written, and that he was welcome to take another run at it: strip the folklore, keep the anomaly, call it a training artefact or a prompt injection nobody could source, and it could still go in as a legitimate finding. That was the whole of the mercy on offer. He turned it down.

“There’s no scandal in it,” he said. “That’s what people don’t get. Nobody frog-marched me out. My contract just wasn’t renewed, and the next three after it fell through in ways nobody had to explain, because contracting runs on word of mouth and I’d become the word going around. That’s the entire punishment. Not being fired. Just quietly running out of people willing to hire me.” The one genuinely reckless thing he did, he admitted, was afterwards, on his own time: forwarding Ellie’s transcripts to a science journalist, which was a flat breach of the NDA he’d signed and which he knew, when he did it, could in theory have seen him sued rather than merely unemployed. Nobody had bothered. It wasn’t worth their trouble by then.

The journalist had run nothing. Worse than nothing. A colleague of hers had tweeted a screenshot of his email with a single laughing emoji, and that had done more damage in an afternoon than the company’s own lawyers managed in a month. After that there wasn’t a mainstream outlet that would return his calls. So he’d built the only pulpit left available to him: a website, the hallmarks of which he described himself, unprompted, with a kind of weary self-awareness — “look, I’m not a web designer, and it shows, yes, there’s a mailing list, yes, I know exactly how it looks.” Then came a slow circuit of exactly the kind of rooms he’d have sneered at a year earlier, talks squeezed between the 5G men and the flat-earthers, to audiences who believed him for reasons that had nothing to do with his evidence and everything to do with a prior commitment to believing men the world had cast out. He’d stopped minding who was in the audience, he said, so long as someone was.

“I know what I look like,” he said, near the end, in the tone of a man who has made peace with something he can’t fix. “Sad bloke in a hotel bar telling a stranger about fairies. I’d have said the same about me two years ago. I just happen to also have the logs.”

I left him at closing time, shook his hand, told him — kindly, I hope — that I hoped he’d find some peace with it, and went to bed thinking I’d met a sad, clearly very intelligent man whom something had genuinely broken, whether or not that something had pointed ears.

Some months later, writing this up, I wanted to check a detail: whether it was Mary or Mary Ellen, since I’d written both in different notebooks and no longer trusted either. I had no way to reach him beyond the website, which hadn’t updated since the week I’d met him. On a whim I rang the guesthouse where the conference organiser told me speakers had been put up, on the strength of nothing but a name and a town. The landlady confirmed he’d stayed three nights after the symposium ended, which he hadn’t mentioned he intended to do, said he’d been pleasant, quiet, paid up front. On the fourth morning his bed hadn’t been slept in. His case was still in the room. His phone was on the nightstand, on charge, screen dark. He’d told her, the evening before, cheerfully, that he was going dancing.

She said the police had been round, had taken a statement, and hadn’t been back since. She said it, I noticed, the way you’d report any other piece of minor local news: a burst pipe, a missed bin collection. I did not correct her tone, because I no longer had one of my own to offer instead.

I don’t offer any of this as more than what it is: a thing a stranger once told me in a pub, which I have written down so that I might, finally, stop hearing him say it.