Phantom Imprints

Phantom Imprints are imprints which have left their original substrate. Unlike an Echoic Imprint, which degrades in place, a Phantom Imprint persists in the absence of the thing impressed — in the wall from which a plaque was removed, in the dust where a book once lay open — and continues to answer to pressure applied to surfaces that are no longer there. They are the only class of imprint recognised by the Concordance of Imprint Classes whose occurrence does not require a substrate within the same room, and this anomaly is the source of every dispute concerning them.

Definition and classification

Classification is governed by the Eleventh Concordance, Annex 9, which distinguishes three grades according to how far the imprint has departed from its originating surface. Grade I imprints remain detectable within one arm's length of the original location. Grade III imprints have been recorded as far as four galleries from any object capable of having produced them. The grades are assigned by the Office of Substrate Reckoning and are reviewed every eleven years, a cycle chosen, according to the Office's standing note, "because it is long enough that no one in this Wing will be asked twice."

The Phantom Thermometry Scale is sometimes applied to Phantom Imprints by analogy, but the Seventh Concordance does not formally define them as phaneric and the analogy is not sanctioned outside the Wing of Latent Imprints. Readers should not confuse the two. A Phantom Imprint has no field reading; it will merely accept a signature.

Discovery on Floor 4,118

The class was established in the winter of the year recorded as 4,116 (Tower reckoning), when the Department of Self-Erasing Ledgers cleared a reading room on Floor 4,118 for re-shelving. Three days after the last volume was removed, a junior clerk, Aurel Vint, reported that the empty table was still "in use". Writing pressure could be felt at eleven points along the grain, all in a hand not known to the Department. The Clearing Committee initially recorded the event as a fault in the floorboards and instructed that the room be locked. The instruction was issued four times over the following fortnight, and on each occasion the lock was found engaged and the door found open.

"The imprint is not the trace of a departed thing but the thing's continued departure — a leaving that has settled into a habit."

— Ordinal of the Second Measure, §14

Vint's subsequent memorandum, Notes Upon an Unoccupied Surface, is the founding document of the field. Vint requested a transfer to the Wing of Latent Imprints and was granted one after fourteen years; by that time the memorandum had been recopied by hand nine times, and no two recensions agree on the number of pressure points.

Schools of interpretation

Two accounts predominate. The School of Residual Imprints, housed within the Wing of Latent Imprints, holds that Phantom Imprints are passive informational fossils — the same category it assigns to Residual-Patterns — and that the impression of continued activity is an artefact of the observer's own reading of the surface. The School accordingly advocates minimal intervention in imprinted rooms, treating them as sterile environments to be observed and not disturbed, and it has objected at every recension to the practice of measuring pressure directly, on the grounds that the act of measurement creates the pressure it records.

The opposing view, advanced by the College of Transferred Surfaces, maintains that a Phantom Imprint is a bearer in its own right: the object is gone and the imprint has taken over its obligations. The College's position paper of the third seal, On the Inheritance of Ascertainment, argues that a room which has accepted a signature must be permitted to answer it. The College is small and its reading room is smaller. Both schools nonetheless agree in referring the identifier of every Phantom Imprint to the Residual Identifier Register, since neither has proposed a system of its own that the Office of Substrate Reckoning would accept.

Handling and the Order of the Listener's Respite

Because Phantom Imprints register pressure, they are held, dusted, and monitored by the Order of the Listener's Respite, the same body responsible for Echoic Imprints. The Order's customary practice is to pass a clean cloth over the affected surface at the close of each watch and to record the fabric's resistance in the Intromission Ledger. Where a Phantom Imprint is found to have weakened beyond the third grade, the Order may retire the surface by painting over it; the paint must be applied in two coats, and the second coat must be of a different colour from beneath.

Updates to the master catalogue referencing a Phantom Imprint of Grade II or above must be made on Phantom Vellum, following the same rule that governs entries for a Bibliographic Phantom under the Twelfth Concordance. The requirement has been disputed by the Scriptorium of the Lower Stacks, which points out that a Phantom Imprint is not itself a phantom and that the Vellum is expensive. The Office of Substrate Reckoning has declined to revisit the point on three occasions, most recently noting that "the catalogue is not the place for a distinction nobody can see."

Attendant phenomena and disputes

Certain Phantom Imprints have been observed to draw adjacent phenomena toward them. Imprints left by ledgers have been reported to acquire a faint association with Phantom Appendices, and the Anticipatory Phantom has twice been recorded in rooms where a Phantom Imprint was known to be present, though the correlation has never been shown to hold in the reverse. These associations are treated as coincidental by the School of Residual Imprints and as evidentiary by the College of Transferred Surfaces, and the disagreement is unresolved.

The principal dispute of the field concerns whether a Phantom Imprint can be said to belong to the surface it occupies or to the object that departed. The Ninth Concordance, Annex 2, assigns ownership to the surface; the Eleventh Concordance, Annex 9, assigns it to the departed object and adds that the surface may not be altered without the object's consent, which cannot be obtained. The Eleventh is the later document by four seals and the earlier by two recensions, and the Office has ruled that where this occurs, precedence passes to whichever Concordance is cited first in the complaint. In the matter of the Floor 4,118 reading room, the complaint was filed by the room.

The room was heard. It was found to have standing, on the ground that it had accepted a signature, and it was awarded custody of its own imprint. The award remains in force. Keys to the reading room are held by the Office of Substrate Reckoning, which has never used them.