Spectral Folio of Floor 4,112

The Spectral Folio of Floor 4,112 is a bound volume of disputed extent held at the centre of the reading room on Floor 4,112, from which it takes its name. It is the only object in the Tower to have been simultaneously catalogued as present and as removed, an anomaly that produced the ruling In re: The Spectral Folio of Floor 4,112 and, with it, the doctrine of Librarian infallibility. It is not to be confused with Algernon’s Folio, which is physical, or with The Blank Folio, which is not spectral but merely empty.

Description

The Folio measures thirty-one by twenty-two centimetres closed, a size shared with no other volume in the 4,110s. Its boards are of standard issue and its leaves, when counted, number 214. When counted again, they number 214. The difficulty lies in the interval between the countings, during which the volume is held to emit a low sustained tone, measured by the Office of Spectral Hygiene at 41 hertz and recorded in their register as "audible, unmusical, and not to be answered." Readers are advised not to hum along. The tone is classified as an evidentiary attachment rather than an amendment, per the reasoning set out in the ruling.

Under calibrated lamplight the Folio casts a shadow of a volume slightly larger than itself. Under uncalibrated lamplight it casts no shadow and the reader is asked to leave the room and report to the duty desk. The shadow has been surveyed twice by the Spectral Cartography section, both times at the request of the Adjudication Chamber, and both surveys agree that the shadow is displaced eleven millimetres to the north-northwest of any plausible light source.

The Reconciliation Phase

In Cycle 188, Phase 3, a routine Spectral Baseline Capture returned two readings on the same instrument, thirty-one seconds apart. The first described the Folio as present and consultable. The second described the position as vacant, the shelf dust undisturbed, and the reading room dark. Neither reading could be shown to be corrupt. The floor was placed under Spectral Purity protocols for eleven days while the two accounts were reconciled, and the reconciliation itself became the case.

Senior Arbiter M. Thorne presided. The Chamber's findings, issued on Day 11, declined to determine whether the Folio had been present during the interval. It held instead that actions taken by or against entities during that interval — subsequently named the Lacuna — were non-justiciable, and that the cataloguing record could not be found in error as a corporate act of the Librarians. The Office of Spectral Hygiene objected in writing that this made the second reading unexaminable. The objection was docketed, stamped, and filed as an attachment.

Dispute over the extent of the Lacuna

Scholars do not agree on how long the Lacuna lasted. The Third Concordance, Annex 12, fixes it at "the interval during which the record was of two minds," which is not a duration. The Eleventh Concordance, by contrast, asserts in its preamble that no interval may be recognised which cannot be entered in the day-book, and the day-book for Floor 4,112 shows nothing between the sixth and seventh hours.

The Folio-Spanner guild has entered the dispute on procedural grounds, maintaining that its members were barred from the floor for the whole of the eleventh day and therefore lost forty-one minutes of billable tightening. The Adjudication Chamber has not ruled on the claim, observing that the guild's own timekeeping was kept on a clock that the guild had serviced.

Separately, the Spectral Liability Surveys office has assessed the Folio at a liability of six, the highest band in the Compendium of Spectral Liabilities, Third Edition, on the ground that a volume which may not be there cannot be promised to a reader and may not be refused to one.

Effects on neighbouring holdings

The ruling in the Folio case has been applied well beyond Floor 4,112. The Spectral Engine of Floor 909 had its Materials and Causal Authority revoked partly on the strength of it, the Office of Spectral Hygiene citing the Folio precedent to argue that a device violating causal stability had likewise placed itself beyond examination. The Spectral Librarian of Floor 7,001 has been reported in the reading room on 4,112 on three occasions, though the sighting is recorded only in the Atlas of Unconfirmed Stairwells under Entry X-7001, the "Spectral Landing," and carries the Atlas's standard caveat.

Whether this is the same volume as the one catalogued is not discussed. The Tower recognises one Folio on Floor 4,112 and has no business with a second.

Access

The Folio may be consulted by appointment. Readers should bring a pencil, a valid reader's mark, and no strong opinions about the interval. It may not be photocopied, and it may not be left alone in a room with a lamp that has not been calibrated that quarter.

"The record is of two minds. The reader is kindly asked to be of one."

— Third Concordance, Annex 12, reading room notice