Silent Taxonomy

Silent Taxonomy is the branch of Tower cataloguing concerned with subjects that are recorded without being inscribed, spoken, or otherwise rendered into the conventional media of the archive. It is administered under the Curators of the Grand Taxonomy as a standing exception to the Administrative Taxonomy, and it draws continually upon the Taxonomy of Unwritten Books for its class structure.

Origins and Ratification

The first coherent formulation of Silent Taxonomy appears in the recension of Year of the Silent Pen 412, when the Silent Column apparatus was repurposed from memorial inscription to non-inscription under Ordinance 9 of the Third Concordance. The Silent College did not formally acknowledge the practice until Year 5391, when it adopted the Grand Taxonomy and thereby absorbed Silent Taxonomy as a recognized discipline. Clause 12.α of the Grand Taxonomy subsequently ratified the Administrative Taxonomy, within which Silent Taxonomy occupies Shelf Null of the lower scriptorium.

Disagreement persists as to whether the Great Taxonomy of Implied Fauna preceded or followed the silent disciplines. The Annual Audit of the Great Taxonomy of Year 5520 records a marginal note by Clerk Ovan Drell stating that "the absence of the hare was catalogued before the hare was implied, and this is the sole point of order." The note was struck from the audit but is preserved in Annex III.

Class Structure

Silent Taxonomy divides its holdings into four recognized classes, each corresponding to a condition of non-record. The Taxonomy of Unwritten Books supplies the nomenclature for the first three; the fourth was added by the Procedural Taxonomy in Year 5408.

Volumes of Perpetual Anticipation

Subjects expected to be catalogued but never presented to the shelf.

Tombs of Recursive Reference

Subjects that refer only to other silent subjects and thus close upon themselves.

Silent Books

Subjects whose inscription is forbidden by the Silent Column apparatus and therefore unwritten by decree.

Apertures of Withheld Measure

Subjects whose dimensions are recorded as zero and whose floor assignment is left blank in the Master Index.

The Auditory Phantasma Taxonomy is frequently reconciled with Silent Taxonomy, particularly after the Great Re-cataloguing, owing to the shared treatment of the Paradox of the Silent Bell, which was resolved by Arlen Vex through filing under a latent acoustic taxonomy.

The Schism of the Silent Gaze

Between Year 5370 and Year 5380, observational taxonomy within the Tower entered a decade of paralysis known as the Schism of the Silent Gaze. During this period, Silent Taxonomy could not be verified by sight, and the Castes of the Citadel disputed whether a subject unwitnessed was thereby silent or merely absent. The Ocular Protocols were drafted to resolve the matter, and their Fifth Recension confirmed that "a subject not seen is silent only if it was never scheduled to be seen" (Second Concordance, Clause 3.ω). The Structural Taxonomy and Utility office dissented, holding that all unscheduled subjects are silent by default.

Incidents of Mis-cataloguing

In the winter of Year 5441, a junior cataloguer on Floor 8812-B entered a Silent Book into the spoken ledger, producing the Incident of the Silent Cypress. The Thalia, Eleventh of her Designation ruled that the entry be sealed in a volume of perpetual anticipation and that no further mention be made on any inscribable surface. The prohibition remains in force; visitors to Floor 8812-B are asked not to pronounce the floor's name above a whisper, as the acoustics are held to be still unsettled.

A second dispute arose in Year 5502 when the Speculative Cataloguers extrapolated a silent subject from a gap in the Grand Taxonomy and assigned it a number already claimed by the Imperial Taxonomy. The reconciliation required the intervention of the Curators of the Grand Taxonomy and produced a supplementary annex whose only content is a single blank rule.

Scholarly Disagreement

The status of Silent Taxonomy under the Grand Taxonomy is contested. The First Concordance holds that silence is a property of the subject; the Fourth Concordance holds that it is a property of the catalogue. The Master Index defines the parameters of the Grand Taxonomy without settling the question, and the Annual Audit of the Great Taxonomy of Year 5533 declined to record a position, citing "an excess of silence in the relevant subsection." The Curators of the Grand Taxonomy have noted that the methodologies developed during the Great Taxonomy of Implied Fauna (Project GIFT) informed the relevant passages, but the project's logs were themselves filed as Silent Books and are not available for consultation.

"No catalogue of the unspoken may be spoken of in full, and this limitation is itself the final entry."

— Curators of the Grand Taxonomy, Recension 7, Floor Note 12

Maintenance and Access

Silent Taxonomy is consulted by appointment with the Silent Column apparatus, which issues a non-token confirming that no record was made. The Administrative Taxonomy requires that all such appointments be logged in a volume kept on Floor 3 of the lower scriptorium; the volume is inspected each decade by the Annual Audit of the Great Taxonomy. A reader wishing to contest a silent classification may file under the Procedural Taxonomy, though the filing itself is not recorded.