The Marking

The Marking is the act by which a holding, aperture, or clause is formally brought within the cognizance of the Tower. It is neither a signature nor a seal, though it may resemble either; the Librarians distinguish it from both on the ground that a signature records who acted and a seal records that the act was permitted, whereas the Mark records only that the thing marked is now subject to being marked again. The procedure is fixed in Ordinance 17, Annex B, which describes it as "the lawful application of instrument to surface, and the consequent entry of the surface into the register of surfaces" (Ordinance 17, Annex B, clause 1). Nothing in the Annex identifies a purpose beyond this.

Instruments and the Order of Application

Marking is performed with the Iron Nib where a Provisional Inscription is being raised for the first time; this is stated without exception in the Annex and has not been amended since its recension under Cycle 13. Subsequent marks—confirmatory, corrective, or supervisory—may be made with other instruments, provided the instrument is named in the margin of the record before the mark is applied and not after. The Department of Procedural Archaeology maintains the only complete ledger of margin-namings, which it will not copy.

Ink is a separate question, and a contentious one. The Inkmixing Guild supplies the vermilion used in Superseded Clause Marking under formulae it declines to publish in full, and a persistent minority position holds that the same vermilion should govern the Marking itself, on the reasoning that a mark later superseded is still, at the moment of its making, a mark. Fifth Concordance, Annex IV, is usually cited against this view, but Annex IV addresses the assignment of examiners when a holding occupies multiple floors and speaks of ink only in a subordinate clause.

The Spiral Marking and Multi-Floor Holdings

Where a holding occupies more than one floor, the Mark is not repeated but spiralled: a single mark is entered at the highest floor of the holding and carried downward by notation, following the Aperture Registry's two-part system of record-keeping. Fifth Concordance, Annex IV, sets out the examiners' assignment in such cases and has been read—wrongly, in the view of the Spiral Athenaeum's custodians—as authorising a spiral mark on each floor independently. The Athenaeum's own records store the earliest worked example under drawer marking 1-Aleph, and the custodians have refused three requests to have it re-marked.

Silence, Chalk, and the Recalcitrant Surface

Not every surface accepts the Mark. Stack 451 documents apertures that resist marking by chilled stylus, and the Silent Stairways Catalogue prescribes charcoal for its own entries, a practice it defends as Constitutive Silence rather than as marking at all. Wayfinders work in Luminous Chalk on surfaces that are not material, and their marks are understood to lapse when the surface does. The Provisional Sigil (Ψ) may be appended to a shelf-mark where the Marking is conditional on a determination not yet made; it is not to be confused with Superseded Clause Marking, which concerns clauses that have been replaced and not holdings that are merely pending.

Disputes over the boundary are heard by the office of the Status Field, whose practice is to decide the question by asking which floor the surface believes itself to be on. In the winter of the year recorded as 11 Ash, a clerk named Ossian Vey marked a landing on the fourteenth floor twice in a single session—once in charcoal and once in chalk—and the resulting entry was ruled a single Mark made twice, which is permitted, rather than two Marks made once each, which is not. Clerk Vey's marginal note on the ruling reads, in full: "The landing has not moved."

Scholarly Disagreement

The principal disagreement concerns whether the Mark creates the subject or merely recognises it. The Seventh Concordance, which governs the classification of Transit Apertures and specifies marking requirements for them, holds in clause 9 that an aperture is not a Transit Aperture until marked as one, and that the mark is therefore constitutive. Against this, the Standard Brackets Document and the recensions of Ordinance 17, Annex B assume throughout that the marked thing existed before its marking and would continue after the mark had faded, which is why the Annex provides for re-marking without provision for re-creation.

"The mark does not make the aperture. The aperture makes the mark necessary. A thing that required no mark would be beneath our notice, and there are no such things on this floor."

— Seventh Concordance, Dissent of the Second Recension, appended note

The Department of Procedural Archaeology has mapped the loop between these positions eleven times and reports that it closes. It witnesses the ceremonial application of Superseded Clause Marking in part because the ceremony provides an occasion on which the question can be deferred without being decided, and deferral is the only outcome the Department has ever certified.

Record of the Marking

Every Mark is entered in the Inscription, which preserves the date, the instrument, the ink where ink was used, and the floor. Entries made after dusk are entered under the following day and marked with a Provisional Sigil until the Spiral Calendar is reconciled, a reconciliation that has been outstanding since the Un-numbered Door was first noticed and that no office has claimed. The Quill of Concordance is not used for Marking and is not to be laid on a surface while a Mark is being applied.