Locations

The Meridian

Type: Train / Mobile city-state
Description: The primary setting. A vast train, miles long, that runs a continent-spanning loop through the northern territories. It carries thousands of passengers across dozens of carriage classes — from the polished brass and velvet of the First Carriages at the front, through the working middle sections, down to the open living carriages near the rear where bunks are cheap and questions aren’t asked. The Meridian is old, loud, and alive. Its metal groans. Its corridors smell of oil and cooked food and too many people.
Significance: This is the world for Book One. The entire story takes place aboard The Meridian. Its social geography — who lives where, who can move between carriages, who controls the junctions — is the map of the story.
Key scenes set here: Almost all of them.

The Farm Carriages

Type: Carriage district / agricultural
Description: A stretch of semi-open carriages towards the rear of The Meridian where the train grows its own food and keeps its livestock. The sides are partially open to the air — slatted walls that let in light and wind, covered with canvas when the weather turns. Some carriages hold crops in long troughs under rigged lighting; others house goats, chickens, and a few stubborn pigs. The smell hits you before you see them. Workers here tend animals, muck out stalls, harvest what’s grown, and haul it forward to the kitchens and markets in the middle carriages. It’s hard, unglamorous gig work — but it’s always available and it keeps the train fed.
Significance: The economic engine of the lower train. Where passengers earn chits through physical labour. Represents the invisible work that keeps the whole society running.
Key scenes set here: Background texture, possible investigation scenes in later chapters.

The Open Living Carriage (Carriage 74)

Type: Carriage / neighbourhood
Description: A long, wide carriage fitted with rows of bunks stacked three high, separated by hanging sheets and improvised partitions. It’s loud, cramped, and never fully dark — someone is always awake, talking, cooking on a shared stove plate, or arguing. Despite the chaos, there’s a community here. People look out for each other, mostly. Mr Fixer and Mr Plum have prime bunks near the rear wall, which they’ve held for years through a combination of respect and strategic favour-trading.
Significance: Elliot’s first home in Train World. Where he learns the rhythms of life on the train and meets the people who become his anchor.
Key scenes set here: Elliot’s first night, early bonding with Fixer and Plum, the Conductor’s visit that kicks off the main plot.

The Tea Car

Type: Carriage / social hub
Description: Birdie Wren’s domain. A narrow carriage fitted as a café of sorts — mismatched chairs, a long counter, a permanently boiling urn. Serves tea, weak beer, and whatever food Birdie has managed to source. It sits between the open carriages and the working middle section, making it a crossroads where different classes mix. Birdie tolerates everyone but plays favourites.
Significance: The information hub. Where Elliot picks up leads, where rumours circulate, where deals are whispered over tin cups.
Key scenes set here: Elliot hearing about the gramophone theft, key conversations with Birdie.

The Administrative Carriage

Type: Carriage / bureaucratic centre
Description: A quiet, orderly carriage near the front-middle of the train where the Conductor’s clerks manage the paperwork of a mobile city — tickets, cargo manifests, passenger rolls, dispute records. Everything is filed in wooden cabinets that rattle gently with the train’s motion. It smells of ink and old paper. Casper Noll works here.
Significance: Where the official record of the train lives — and where gaps in that record might reveal clues about the gramophone and its thief.
Key scenes set here: Elliot’s deal with the Conductor, research into the gramophone’s history.

The First Carriages

Type: Carriage district / upper class
Description: The front section of The Meridian, where the wealthy and powerful live. These carriages are two-storey: the ground floor holds wide corridors, dining cars with real china, lounges, and service areas; the upper floor contains private living quarters accessed by narrow internal staircases — quiet, carpeted, with actual doors that lock. A different world from the open carriages — clean, guarded, and exclusive. Passengers here have lifetime tickets and political influence. Elliot has no business being here, which naturally means the investigation will drag him in.
Significance: Where the gramophone went missing during preparations for a concert. Represents the class divide and the hidden power structures of the train.
Key scenes set here: Elliot’s first visit to the upper carriages, the concert preparations, key investigation scenes.

The Service Tunnels (The Meridian)

Type: Sub-carriage infrastructure
Description: A network of crawl-spaces and low-ceilinged corridors running beneath the floors of every carriage on The Meridian. Roughly four feet high in most places — taller here, shorter there — built for bodies that have been doing this work long enough that the official height has become irrelevant. Lit by caged bulbs swung on cables. Floors of gritted metal mesh through which the ground blurs past at speed. Always warm forward, cooler rearward. Smell of oil, hot pipe, and the particular damp of ducts in long use. The tunnels are organised into non-overlapping sections by maintenance crew authorisation; the forward boundary of standard authorisation on the middle section is Hatch Forward Seven (FH-7), set into the bulkhead between Carriages 32 and 31. Beyond FH-7 the tunnels continue, lit and maintained, but by a separate worker (or chain of workers) whom the standard crew has never met. By implication the chain extends all the way to the engine — nobody has confirmed where it ends.
Significance: The hidden underside of the train. Where the labour that keeps The Meridian running actually happens, mostly invisibly. Architecturally important: the tunnels are the physical expression of the train’s compartmentalised knowledge structure. (Established in What Powers the Train.)
Key scenes set here: Mira’s arc in What Powers the Train. Available for future side stories and (sparingly) for main-book scenes that need to go below the visible carriage life.

The Maintenance Workshop (The Meridian)

Type: Carriage / workspace
Description: A low-ceilinged carriage between the freight cars and the laundry, where the middle-section maintenance crew bases its operations. Smells of oil, hot tea, and the damp from being permanently downwind of three thousand pairs of wet socks. Tools hung in racks: spanners by gauge, hooked poles, the long rubber-handled prybars the crew calls peacemakers. A laminated schematic of The Meridian’s underside pinned to one wall, edges curling, last updated by someone now dead. Run by the foreman Kettering.
Significance: The institutional centre of middle-section maintenance. Where Mira works, where reports are filed, where chits are issued. (Established in What Powers the Train.)

Purgatory

Type: Metaphysical space / transitional realm
Description: The space between death and arrival in Train World. Elliot’s memory of it is fragmentary — a grey, formless expanse with a sense of motion but no landmarks. A feeling of being processed, sorted, stripped. Voices that might have been instructions. Then: the train, and the shock of arrival with everything still intact.
Significance: The mystery at the heart of the series. What is purgatory? Who runs it? Why did Elliot’s transfer go wrong? Appears in flashbacks and dreams.
Key scenes set here: Opening sequence of Book One (Elliot’s death and passage), recurring dream fragments.

The Wilds

Type: Region / exterior landscape
Description: The land outside the trains. Glimpsed through windows — vast plains, dark forests, mountain ranges, weather systems that move like living things. Beautiful and terrifying. Occasionally the train passes through settlements of “grounders” — small, hardy communities of people who live off-train. Bandits also operate in the wilds, raiding station towns and sometimes attacking trains along remote stretches of track.
Significance: Represents freedom and danger. A constant reminder that the train is both home and cage. The threat of bandits gives urgency to station stops and adds tension to later books.
Key scenes set here: Window observations, station stops in later books, possible bandit encounters.

Station Towns

Type: Settlement / resupply point
Description: Small, fortified communities built alongside the tracks where trains stop briefly for resupply, maintenance, and passenger exchange. They exist in a symbiotic relationship with the trains — providing fresh food, raw materials, and repair crews in exchange for manufactured goods, news, and passage. Station towns are built for speed: wide loading platforms, pre-staged cargo, crews who know the drill. Stops last a few hours at most, because a stationary train is a target.
Significance: The points of contact between train civilisation and the outside world. Where news arrives, where people board and disembark, and where the threat of bandits is most acute.
Key scenes set here: Resupply sequences, potential bandit threat in later books.

Tarnhalt (station town)

Type: Station town / water-and-coal halt (settled polity, ~140 people)
Description: A small fortified halt on the Meridian’s northern loop, on a plain flat enough that the train can be seen coming for the better part of an hour — the smoke first, then the long dark line under it. Named for the tarn up its valley, which feeds a great gravity water-tower by a pipe older than anyone’s grandmother. The town exists to provision the train: water and coal (domestic supply only — kitchens, wash-houses, boiler-rooms), root crops, dried tarn-fish, the few sheep it can spare. The Meridian stops here once per ≈14-month loop for about four hours; the town calls the stop “the tide” (practically, not poetically) and arranges the rest of its life around the gap — children timed between trains, debts reckoned in trains (“three trains for that roof”), the dead counted and committed before the rails bring witnesses. Boring on purpose, which is how a town that small survives raider country. Centre of the town’s life is the station house: one long stone room, stove at one end, and the books at the other — thirty-five-plus years of manifest duplicates in oilcloth, the keepers’ hoarded wealth. (Established in The Station Keeper.)
Significance: The chosen inversion-POV location — the Meridian seen entirely from outside. Tarnhalt is (as far as anyone knows) the one place on the whole circuit where the train’s account of itself is checked against a record kept by someone the train does not pay (the keeper’s tariff countersignature against her independent car-tally). Architecturally important for that reason: the only external audit-point in the world. Run by the keeper (Ilsa Brae, then Sefa) under the town reeve (Tamm).
Key scenes set here: Ilsa Brae’s arc in The Station Keeper. Available for future side stories and for any main-book scene that needs a resupply stop on the northern loop (distinct from Hessa’s Station on the western leg and Coldmere, the northernmost reach).

Bauch’s Crossing (station town)

Type: Station town / timber-and-resupply town on the Meridian’s loop. Larger and rougher than Tarnhalt; a working town, not a quiet halt.
Description: A timber town built where an old wagon road crosses the line (hence the name — a ground crossing, not a train crossing-point). Smells of pitch, woodsmoke, and the river it sits across; saw-noise, stacked timber, black under everyone’s nails. Because it sits on a road as well as the rail, it has always had foot traffic both ways — which is part of why it has long absorbed the people the trains put off. The Meridian stops here for the usual few-hour resupply window. (Established in The Alighting.)
Significance: The town that receives the alighted — people put off a train without a ticket, set down to make a life on the ground. Bauch’s Crossing has done this so many times that it has a name for them, a ledger of the alighted, a shed, and work (timber-hauling) to absorb them. Its civic stance toward the train is deliberate neutrality: it takes no side in a passenger’s dispute, because the train comes back, and a town the trains stop trusting dies of it. Run, for this purpose, by Saar, who keeps the book.
Key scenes set here: Teff’s arc in The Alighting — the Meridian seen from outside as it leaves a man behind. Available for any scene that needs a rougher, road-served resupply town, or the human aftermath of a Conductor’s “put off at the next station town” ruling.

Couplings, Gangways & Circulation (how the train connects)

How people and goods actually move through a train miles long. (See meridian-map for the carriage order these connect.)

Vestibule connections (carriage to carriage). Adjacent carriages join at enclosed, flexible vestibules — a short concertina’d gangway with a sprung floor-plate that shifts underfoot, double doors at each end to keep out the cold and noise. Crossing between carriages means a few seconds of louder rattle, a gust of outside air through the gaps, and the floor moving wrong. Most people stop noticing; new arrivals (and Elliot) don’t, at first. The wealthier the carriages, the better-sealed and quieter the vestibule.
The couplings. Between some carriages — especially toward the rear — the join is a cruder, draughtier coupling space: exposed iron, a view of the blurring ground through the gap, the place you go to be half-outside without leaving. The rear coupling is where Elliot first arrives in Book One; couplings recur as the train’s liminal margins, where private conversations happen (Fixer in the coupling, B1) and where you feel the wilds closest.
Internal staircases (two-storey carriages). In the First Carriages and other two-storey cars, narrow internal staircases climb from the ground-floor corridors and services to the private upper-floor quarters. Circulation is therefore vertical as well as longitudinal: you walk the length of the train on the ground floor and climb to reach a residence. The upper floors are quieter, more exclusive, and easier to control access to — a stairwell is a chokepoint.
Longitudinal movement. There is no fast way along a train this long. You walk, carriage by carriage, vestibule by vestibule — which is why runners (Jem & Pip; Aini on the Calloway) are a trade, why position on the train is destiny, and why the Conductor’s reach thins with distance from the front. Hauling cargo “forward to the kitchens” (rules) is real physical labour across many carriages.
The sub-floor as a second route. Maintenance crews move through the service tunnels beneath the carriages — a parallel circulation system, compartmentalised by authorisation (FH-7). Most passengers never use or think about it. (See above, The Service Tunnels, and meridian-map.)
The crossing gangways. Train-to-train connection exists only at crossing points: temporary plank gangways lashed across moving parallel track, used for a few hours then retracted. Lethal to misuse — “don’t look back on the gangway” (B2; motifs). The only way between trains, once every ~7 years.

The Calloway (Book Two)

Type: Train / Mobile city-state
Description: The Calloway runs the eastern circuit — a different loop across a different continent, meeting The Meridian’s route at crossing points that align once every seven years or so. It carries a similar population to The Meridian but feels immediately, viscerally different. Where The Meridian is pragmatic, orderly, and runs on paperwork and quiet authority, The Calloway is performative. Its hierarchy is visible and theatrical. The carriage classes are marked with coloured banners. Status is displayed, not concealed. The Conductor holds court rather than issuing orders. Markets are loud. Music plays in the corridors. The Calloway is a train that knows it’s being watched and dresses accordingly. It’s not better or worse than The Meridian — it’s a different answer to the same problem of keeping thousands of people alive on a moving city. But for Elliot, it’s a useful mirror: familiar enough to navigate, different enough to keep him off-balance.
Significance: The primary setting for Book Two. Introduces the idea that trains are genuinely distinct civilisations, not variations on a template. What The Calloway does differently from The Meridian reveals things about both.
Key scenes set here: The entire Book Two investigation.

The Calloway — Key Locations

The Crossing Platform

Type: Exterior / junction point
Description: The stretch of parallel track where two trains can run side-to-side, close enough to bridge. Temporary gangways are thrown across between carriages. Cargo is hauled, passengers cross, news is shouted across the gap. It’s loud, dangerous, and runs on a clock — the parallel stretch is only a few miles long before the tracks diverge. Crews on both trains know the drill. The platform is a market, a reunion, a negotiation, and a deadline all at once.
Significance: The threshold. Elliot crosses here and returns here. The four-hour window is defined by the length of parallel track.

Sable’s Court

Type: Carriage / seat of power
Description: Where The Meridian’s Conductor has an administrative carriage — orderly, bureaucratic, quiet — Sable has a court. A wide carriage near the front of The Calloway, fitted with a long table, heavy chairs, coloured lanterns, and an atmosphere that’s half throne room, half dinner party. Sable conducts business here in public, surrounded by her inner circle, making decisions with an audience. The performance is the point — authority exercised visibly is authority reinforced.
Significance: Where Elliot meets Sable. Where the political dynamics of The Calloway are on display. Where the final confrontation plays out.

Toll’s Berth

Type: Carriage / crime scene
Description: A mid-section berth on The Calloway — better than the open carriages, worse than the front. A small, semi-private compartment with a curtain rather than a door. Toll lived here for seven years. By the time Elliot finds him, the berth has already been partially cleaned out by someone who got there first.
Significance: The crime scene. What’s missing from Toll’s berth matters as much as what’s there.

The Calloway’s Record Hall

Type: Carriage / administrative
Description: The Calloway’s equivalent of The Meridian’s administrative carriage, but bigger, louder, and less organised. Records are kept, but the system is different — more oral, more reliant on clerks who remember things rather than files that contain them. Getting information here requires talking to the right person, not pulling the right drawer.
Significance: Where Elliot digs into Toll’s history on The Calloway. The different record-keeping system forces him to work differently than he would on The Meridian.

Book Three Locations

Carriage 41

Type: Carriage / middle section
Description: A working middle carriage on The Meridian. Bunks rather than open dormitories — narrower, semi-private, separated by short wooden partitions and curtains. The kind of carriage where people have lived for a decade or more and have built quiet, durable arrangements with each other: the night-shift haulers in the upper bunks, the menders, the small-trade workers, the off-duty clerks. It is not a glamorous carriage but it is a stable one. Vashti Kade has held a bunk here for the eleven years she has been mapping the train’s route.
Significance: Vashti’s home for the first half of Book Three. The community that has tolerated her obsession with affectionate exhaustion for a decade.

Hessa’s Station

Type: Station town / grounder community
Description: A station town on the western leg of The Meridian’s loop, named for the Marrow family who have lived there for generations. Smaller than the larger resupply towns — fifty or sixty buildings clustered around a wide loading platform, with a low stone wall against the wind. The grounders here have a reputation among Meridian crews as polite, unhurried, and resistant to small talk. Hessa Marrow’s house is a single low-ceilinged room with a smell of woodsmoke; she is usually outside it on a wooden chair, with the sun on her face. Half a mile into the woods past the town’s edge stands the marker — a waist-high grey stone with forty-seven tally-marks weathered into it across four generations of keepers, set deliberately at a measured distance from the track (~30 ft when raised; ~4 ft now). The track has, over those four generations (~a century), moved closer.
Significance: Where the grounders’ oral history of the slow build lives. Where Vashti, Casper, and Elliot are shown the marker and confront, for the first time, what the changes in the track actually mean.

Vashti’s Office

Type: Carriage / private workspace
Description: A small, clean room in a front-middle carriage, with a window, a desk, and one wall large enough to pin maps to. Given to Vashti by the Conductor in the third act of Book Three, after she and Casper are folded — quietly, with polite menace — into the small administrative circle that knows about the slow build. The office is, on the surface, a reward. It is also, by being where it is, a way of keeping her where she can be watched.
Significance: The visible marker of Vashti’s transition from private obsessive to sanctioned investigator. Where Book Three closes its third act and where the work of Book Four (or whatever comes next) begins.