This archive tracks four layers. A record present in 4 of them (HH, AoI, M41, IND) is silent in the rest, and says so.
The Horus HeresyM30–M31
imperium
Loyalist courier; the warning to Terra
An old Death Guard frigate that was only carrying Garro's company because he was too injured to make the drop. When the virus bombs went into the racks he took the ship, ran it out of the Isstvan system past Typhon's guns, and burned it out getting the news to Terra. The Heresy is public knowledge because of this vessel.
Position: Isstvan System (Isstvan III, Isstvan V) In orbit over Isstvan III as a Death Guard vessel; Garro takes the ship after Grulgor's men are killed loading virus bombs, and escapes the system under fire from the Terminus Est Cited in Galaxy in Flames
Position: Sol System (Luna, Mars, Terra, Titan) Crippled out of the warp, warp engines jettisoned and detonated as a distress flare, found by the Phalanx and scuttled once the Seventy were aboard Cited in The Flight of the Eisenstein
Age of the ImperiumM32–M40
unknown
[RECORD LOST]
[RECORD LOST]
the ship was scuttled after the Imperial Fists took its survivors off. Published sources say only that its status is unclear from this point on.
Position in this era: [RECORD LOST].
The 41st Millenniumpre-Rift
unknown
[RECORD LOST]
[RECORD LOST]
same gap. Ten thousand years of Imperial record-keeping has nothing verifiable on where the hull went.
Position in this era: [RECORD LOST].
Era Indomituspost-Rift
unknown
Sighted; an omen rather than a ship
Since the Rift opened the Eisenstein is reported to have been seen repeatedly, and the telling is that on the seventh sighting Mortarion comes with it. No position is recorded for any of these appearances, so none is drawn.
Position in this era: [RECORD LOST].
Position
A mobile record: it carries a position timeline rather than a fixed point. The archive places it in 1 of the four eras (HH); each era section above carries that era's entry.
Books set here
3 titles in the reading tracker touch 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.
classhigh
wh40k.lexicanum.com/wiki/Eisenstein 'at over 2 kilometers long and resembling a Gladius Class Frigate, the Eisenstein was in service to the Death Guard by the events on Isstvan III'
positionshigh
wh40k.lexicanum.com/wiki/Eisenstein §History — the Isstvan escape past the Terminus Est, then the failed Geller field, the jettisoned warp engines and the rescue by the Phalanx
positions-solmedium
derived: Lexicanum records the rescue and the scuttling but names no system for them. Sol is our reading — the ship's entire purpose was reaching Terra, and this dataset already stations the Phalanx over Terra in this era
fatehigh
wh40k.lexicanum.com/wiki/Eisenstein 'the Eisenstein was scuttled'; 'Since the Heresy, the Eisenstein has garnered a mysterious reputation and its status remains unclear'. The post-Rift sightings and the Mortarion omen are recorded as a telling, not as a location
crew-disputehigh
wh40k.lexicanum.com/wiki/Eisenstein §Conflicting sources disagrees on who led the Seventy and how many came from each Legion. That conflict is about the passengers, not the vessel or its course, so no disputed flag is set on this record
archetypehigh
escort. The catalogue has no entry for a frigate — it deliberately excludes 'one-novel vessels and duplicate names using an indistinguishable base hull' — but the class statement above ('resembling a Gladius Class Frigate') maps straight onto the renderer's escort hull, which is the smallest thing it draws