Temporal Anchoring

Temporal Anchoring is the formal practice by which an object, record, or floor is fixed to a stated date of origin, so that subsequent cataloguing can proceed as though the date were settled. It is distinguished from Anchoring proper—which arrests drift of context rather than of date—by the nature of the quantity being held still, and is governed jointly by the Division of Temporal Consistency and the Division of Contextual Anchoring, whose overlapping authority in the matter has never been resolved to the satisfaction of either. The practice is old, heavily annotated, and performed less often than it is invoked.

Where the two are confused, the error is usually traced to the Manual of Referential Protocol, whose Annex Delta addresses temporal constraints in language that readers have taken to apply to both practices indiscriminately. The Division of Contextual Anchoring has declined four times to issue a clarifying recension, on the grounds that the fourth such recension would itself require anchoring.

Procedure and the Primary Vestibule

The Rite of Temporal Anchoring may be legally performed only in a Primary Vestibule. This restriction is not ceremonial. Vestibules are among the few rooms in the Tower whose dimensions have been independently verified on more than one occasion, and the Rite requires a space whose measurements will not change during the reading. A Rite begun in a corridor is void, and the party who began it must submit a Statement of Void Commencement to the Office of Unfinished Rites within the same floor-day.

The Rite proceeds by the recitation of the object's disputed dates in descending order, followed by the declaration of a single administrative origin against which all subsequent dating is reckoned. Since the publication of the Justifications for Temporal Anchoring, that origin has ordinarily been the First Concordance, a choice the document defends as "non-arbitrary, being the earliest instrument whose own date is not in question" (Justifications for Temporal Anchoring, fragment ii). The fragment breaks off before the defence is completed, and the remainder has been reconstructed twice, differently.

Dispute: the disputed date as anchor

The principal scholarly disagreement concerns whether an object with genuinely contested dates may be anchored at all, or whether anchoring must await resolution of the contest. The Division of Temporal Consistency holds the former: that anchoring is precisely the instrument by which a contested date is made administrable, and that to wait for resolution is to wait indefinitely. The Division of Contextual Anchoring holds the latter, citing the Principle of Contextual Primacy, and has on at least one occasion refused to countersign a Rite that the Division of Temporal Consistency had already sealed.

The refusal, recorded in the winter of the year the Tower dated 3,214, concerned a reliquary casket from a stairwell landing whose date of manufacture had been assigned to three different centuries by three different examiners. The casket was anchored, unanchored, and re-anchored within eleven days. Librarian Ossia Venn, who witnessed all three ceremonies, later wrote that "the casket did not move, but the century did, and I am no longer certain which of them was being held" (Venn, Marginalia on the Casket Cycle, leaf 7). The episode is the standing example in both divisions' instructional recensions, and each tells it to illustrate the other's error.

Interaction with other anchorings

Temporal Anchoring is a prerequisite for Cross-Referential Anchoring: an entry cannot be cross-anchored to the floors holding its referents until its own date has been fixed, because the referents may be dated and the entry may not, and the resulting mismatch registers as a fault in the index. It is likewise required before any procedure involving Recursive Anchoring, since a recursion anchored to a contested date tends to return itself, and a returned recursion must be filed as a Recursive Nullity at the practitioner's own expense.

Jurisdictional Anchoring supersedes standard Anchoring protocols where a delineation is sought for the purpose of arbitration, and practitioners have sometimes attempted to reach it by way of a Temporal Rite in order to avoid the Primary Vestibule requirement. The Directorate of Ontological Anchoring has ruled against this manoeuvre twice, most recently in a decision noting that "a vestibule entered for the purpose of not being in a vestibule is not a vestibule" (Directorate of Ontological Anchoring, Ruling 88). The ruling is widely cited and, according to the Division of Temporal Consistency, widely misapplied.

Failure and remediation

Temporal Anchoring fails in a characteristic manner: the anchor holds, but the object drifts around it. A floor so affected retains its stated date while its contents are found, on inspection, to belong to other years. The remedy is not re-anchoring but Anchoring under the standard procedure, applied by the Division of Contextual Anchoring, which reviews failed Contextual Verifications and treats drift as a symptom of context rather than of date. Practitioners are advised to record the drift before correcting it, as the correction frequently removes the evidence.

"Anchor the date and the room will keep it. The room has never been asked to keep anything else."

— Manual of Referential Protocol, Annex Delta, marginal instruction

Records and housekeeping

Every completed Rite is entered in the Vestibule Register of the floor on which it was performed, in ink, with the officiating Librarian's mark and the date as anchored. Registers are not removed from their floors. A request to consult a Register from another floor must be made in writing and is granted only to parties who can state the anchored date they expect to find; requests that describe the date as uncertain are returned unread. The Registers of the upper vestibules are bound in green, those of the lower in brown, and the difference is not recorded anywhere.

Instruments used in the Rite—the dating rule, the origin tablet, and the sealing cord—are held at the vestibule and are not to be carried between floors. This prohibition was added after an incident on the landing between Spiral 11 and the Newel Post, in which a dating rule was carried downward and arrived bearing a date it had not been given. The rule was retired; the landing remains in use.