This archive tracks four layers. A record present in 1 of them (M41) is silent in the rest, and says so.
The Horus HeresyM30–M31
[RECORD LOST]
No record for this location in The Horus Heresy.
Age of the ImperiumM32–M40
[RECORD LOST]
No record for this location in Age of the Imperium.
The 41st Millenniumpre-Rift
imperium
Imperial world in the aftermath of a crushed insurrection; plague outbreak, 938.M41
An Imperial world where, in 938.M41, the Valhallan 597th and Commissar Ciaphas Cain are sent to help the local defence force mop up the remnants of a recently quashed civil insurrection, and where a warp-tainted infection then spreads through the Imperial Guard, killing its victims and raising them as flesh-eating dead (Old Soldiers Never Die).
Era Indomituspost-Rift
[RECORD LOST]
No record for this location in Era Indomitus.
Position
Map frame: 64.3, 594.2 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 446 units ≈ 47.4k light years, west of the galactic core.
Height above the disk plane: 7.3 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Lentonia System
Books set here
1 title in the reading tracker touches this record, 1 of them as a primary location. Titles link out to the tracker.
Every fact in this record, and where it came from. Editorial derivations say so.
identityhigh
wh40k.lexicanum.com/wiki/Old_Soldiers_Never_Die_(Novella ) (read directly in a browser on 2026-10-03): Black Library's cover description, 'Deployed to the world of Lentonia to police the aftermath of an insurrection, Cain and the Valhallan 597th have to deal with a dangerous disease spreading through the Astra Militarum ranks', and the synopsis, '938.M41: The Valhallan 597th and its Commissar, Ciaphas Cain are deployed to Lentonia to help the local PDF mop up the remnants of a recently-quashed civil insurrection' (Editorial Note preceding Chapter One). https://wh40k.lexicanum.com/wiki/Valhallan_597th: '938.M41: The 597th is deployed to Lentonia ... only to combat a later outbreak of the Plague of Unbelief' (ch. 3). Warhammer Community, 7 Jun 2023 (https://www.warhammer-community.com/en-gb/articles/4qP0Bjth/ciaphas-cain-reluctantly-returns-in-a-new-novel-and-a-collection-of-classic-tales/), spells it 'Lenotionia' once; Black Library's own description and Lexicanum spell it Lentonia, which is the label used. NAME-COLLISION CHECK: Lexicanum's Lentonia page does not exist, and no index record uses the id or label.
book-joinhigh
PRIMARY for Old Soldiers Never Die (ciaphas-cain::cain-main::8.5): the whole novella is the 597th's Lentonia deployment (Black Library's cover description; Lexicanum synopsis and Valhallan_597th).
segmentumhigh
No source read places it: Lexicanum has no Lentonia page, and neither the novella page, the Valhallan_597th page nor the Warhammer Community posts give a segmentum, sector, neighbour or bearing. Lexicanum Plague_of_Unbelief puts a later 'Plague of Unbelief' in Segmentum Obscurus shortly before the 13th Black Crusade, which is a different, later event and does not locate this world. No segmentum is claimed.
classlow
editorial, NOT a citation: no permitted source describes what Lentonia LOOKS like (its terrain, climate or colour); it is an inhabited Imperial world with a planetary defence force and a recent civil insurrection. Rendered `temperate` as the neutral default for an inhabited world, as for Nikaea, Fura IV and Aldana. Repaint if a permitted source describes its surface.
gposlow
inferred: no page read names a segmentum, sector, subsector, neighbour, bearing or theatre for Lentonia, so there is nothing to place it against. The record claims no segmentum and sits on the unsurveyed rim at the generator's rim_xy('lentonia') = (64.3, 594.2), reproduced from build_locations.py's own fnv1a/CORE (checked against Dynikas V's stored point (701.5, 113.3); the generator was not run). The position carries no information and must not be read as one. Z 7.3 is the zPolicy value (compute-z.mjs lentonia 64.3 594.2).
erashigh
m41 only: Lexicanum dates the deployment to 938.M41 (Old_Soldiers_Never_Die_(Novella), Editorial Note preceding Chapter One; Valhallan_597th, ch. 3). Allegiance 'imperium': the 597th is deployed in support of the local PDF after the insurrection was quashed. No source read says anything of Lentonia in hh, aoi or indomitus. The plague's identity and the outcome are kept off the record (spoilers).
systemIdmedium
lentonia, editorial: no page names Lentonia's system, star or any other body; the id is the world's own because no index record or system file uses it.
no-system-surveyhigh
No systems/lentonia.json is authored, deliberately: although Lentonia is this novella's PRIMARY setting, canon enumerates nothing about its system (no star, no other named body, not even a body count), so an invented survey would contradict the one thing the sources say. The map synthesises its globe from this record's class.
trivialow
Lexicanum Old_Soldiers_Never_Die_(Novella), Trivia (marked not officially sanctioned): the name appears to come from Lenton Lane, the Nottingham street where Games Workshop's head office stands. Recorded for context only; nothing on the record rests on it.