Xenology — Contact UMBRA (Class IV)

Doctrinal designation — Contactus Umbra, “the Shadow Contact” (pattern designation).

• Threat classification — Class IV: Unknown / Insufficient Data.
• Service vernacular — none authorised. A name is a shape, and the Office declines to give it one.
• Contact events on record — three confirmed (1985, 1998, 2019), plus one unverified (2026).
• Physical remains — none. No specimen, no residue, no debris of the contact itself — ever.
• Current status — pattern standing. Recurrence interval irregular; no predictive model has survived its next data point.
• Registry — Registrum Xenologicum IV-001.

What follows is the entire UMBRA record. The brevity is the file.

Contact 1 — 17-09-1985, the Deep Shoals survey line

The survey tender Cormorant found drifting, intact, powered, uncrewed. Organic mass removed — all of it, with a selectivity no recovered mechanism explains: crew, provisions, the hydroponics rack, the leather of the log-book binding. The log itself untouched. Final entry, four days prior, unremarkable. No breach, no residue, no defence wound in the hull.

Contact 2 — 03-02-1998, the Verge picket

A picket frigate's passive array held, for eleven minutes, a return with mass and no emission — a gravitational presence, cold on every band, moving against the system's plane. Weapons were not released; the return faded without translation signature. Corroborated by two arrays; no visual.

Contact 3 — 26-11-2019, the Hollow Reach

The long-haul freighter Persistent recovered as the Cormorant was recovered: intact, powered, organic mass removed with the same selectivity. One difference. The Persistent's vox log holds nineteen seconds of unidentified sound on an internal channel, timestamped three days after the crew's last entry. The Office's analysts do not agree on what the sound is. The Office's doctrine does not require them to. The nineteen seconds remain sealed under Office review.

Contact 4 (unverified) — 12-02-2026, off the Marches

A survey tender lost with a final transmission fragment consistent with the 1998 return signature. Wreck not recovered; attribution not established; the entry is held open and unweighted. Single fragmentary source. This entry confers no pattern extension.

• Something operates in the deep void that removes organic mass from human hulls with total selectivity and leaves no trace of itself.
• It defeats, or bypasses, every passive and active detection doctrine in service — except twice, if the 1998 and 2026 returns are it, which is not established.
• Its recurrence is real (three confirmed events, one signature class) and unmodellable (three intervals, no period).
• Nothing else.

The Office notes, for the record, the human instinct to assemble these fragments into an intention — a hunter, a harvest, a message. The file supports none of these nouns. Absence of data is not absence of threat; neither is it licence for narrative.

Posture is fixed by the classification system: hostile by default; no unsupervised contact. Applied to a pattern rather than a species, the posture instantiates as standing orders:

• Report and hold. A return matching the UMBRA signature class is reported on the sealed channel immediately. It is not pursued, not hailed, not illuminated by active sweep without High Command sanction. Twice the Republic has held a thing on passive array and lost it; doctrine prefers the loss to the introduction.
• Recovery discipline. A hull recovered in the UMBRA condition is treated as a sealed scene of the Office — boarded by Commissariat-tasked teams under full record, catalogued, and held. The Cormorant and the Persistent remain in Republic custody, in vacuum store, unvisited except by review.
• Survey doctrine. Deep-void survey elements operate paired, within mutual-return distance. No UMBRA event has occurred against a paired element; whether that is deterrence or coincidence is — like everything in this file — insufficient.

Everything material. Whether UMBRA is one thing or a class of things; whether it is alive, made, or either; what the removed mass is for; whether the selectivity is appetite, protocol, or neither noun's business; why the log-book leather and not the log; what the nineteen seconds are. Whether it has noticed being noticed.

The Office keeps this section deliberately complete: in a Class IV file, the inventory of ignorance is the primary intelligence product. Every future contact is to be read against this section first, so that what it changes is seen exactly.

This file converts from pattern to species registry — and the class is re-assessed — upon any of:

• recovery of physical remains of the contact itself;
• a corroborated visual;
• a second instrumented event matching 1998 within predictive interval;
• communication of any kind.

None has occurred. The Office does not expect any. The Office has been wrong about the deep void before, and holds the file accordingly.

One Class IV addition to the general rule: no vernacular is authorised. The service instinct to name a thing (“the Shadow”, “the Reaper of the Shoals”) gives it a shape the evidence does not support, and shapes accrete into false doctrine.

In every register, the pattern is referenced as Contactus Umbra or “the UMBRA pattern”. The record is not embellished, the nineteen seconds are not resolved, and the noun the file withholds is not supplied.

• Physical nature — UNKNOWN. No specimen, no residue, no debris of the contact itself, ever.
• Scale — unknown. The 1998 and 2026 returns read as mass without emission — instrumental only, unconfirmed.
• Silhouette — none confirmed. No corroborated visual exists.
• Locked palette — unknown. Only the aftermath has colour: intact crewless decks; the log-book spine without its leather.
• Visual anchors — the aftermath, never the agent: a hull intact, powered, stripped of all organic mass; a passive return with mass and no emission; the sealed nineteen seconds.
• Distinguishing marks — the selectivity. Crew and the leather of the log-book binding taken; the log itself untouched.

Render gate — DO NOT DEPICT

There is no canonical form. Aftermath scenes — a stripped, intact hull — may be depicted. The contact itself may not.

• Any image of the contact itself is doctrinal error.
• No form, face, or silhouette is to be given to what has no corroborated visual.
• Justification — a Class IV pattern rendered is a shape the evidence does not support: false doctrine accreted into an image.

In prose the pattern is never shown and never described as an agent — only the aftermath. The nineteen seconds are never resolved.