Custodial Register for Unrealized Spaces

The Custodial Register for Unrealized Spaces is the Tower's principal schedule of spaces that were proposed, surveyed, numbered, or merely imagined, and then not built. It is maintained by the Personnel Annex, which logs its activities in the Register by long-standing practice, though the Register's own authority to compel that practice has never been located in any founding instrument. The Register is bound in nineteen volumes, of which fourteen are in use; the remaining five were bound in advance by Clerks of the Granite Step against volumes that had not yet been requested, a decision the Guild has never defended in writing.

As an administrative object, the Register is modestly sized. As a doctrinal one, it stands at the centre of the Schism of Unrealized Holdings, which began as a dispute over how its columns should be ruled and has not yet concluded.

Scope and method

A space is entered in the Register when a proposal for it has been lodged with the Bureau, received a floor number, and then lapsed — through withdrawn petition, exhausted survey allotment, or a Custodial Tribunal finding under Third Concordance that the space was never capable of realization. Entries are continuous across the nineteenth volume; spaces that lapse and later revive receive a cross-reference rather than a fresh line.

Each entry records the proposed floor, its working name, the surveying office, the date of lapse, and a column headed Residual Disposition. The last of these is the Register's famous difficulty, and the source of most of its litigation. Bureau of Theoretical Cartography drafted the column in the old hand as a single wide field, and no recension has ever specified what may be written in it. In practice, clerks write short and contradictory things: pending seal, held for the next vertical, see Sigma12. A note appended in Volume 9 by an unnamed hand reads simply: "Nothing is to be entered in this column in green."

History of the volumes

The Register's earliest continuous run dates from the accession of Custodial Register Delta-4, from whom the present numbering convention takes its name. Whether the volumes prior to Delta-4 were lost, never compiled, or are held elsewhere is contested. Indexers Guild theoreticians have long argued that the pre-Delta-4 Register cannot have existed, on the grounds that its own title was not then in use, while the Annals of the Lower Stacks cite a Register entry for Floor 3071 that appears to predate Delta-4's accession by eleven years. The Annals' entry is short, and the folio number it gives does not appear in any surviving volume.

Growth has been fitful. Volumes 11 through 13 were rebound after a damp winter on the fourteenth landing; the bindery returned them in reverse order, and for nine years the Register was consulted backwards by a generation of clerks who assumed the sequence was intentional. The error was found by a junior clerk checking a cross-reference, and corrected quietly, without notation. Volume 14 is the last to use the older gauge of paper and is slightly taller than the volumes beside it.

Doctrine: the Register as record

The central question is whether an entry in the Register constitutes an unrealized space, or merely evidences that someone once intended one. The Master Survey of Unrealized Architectonics treats the question as settled in favour of mere evidence, and cites In Re the Whispering Corridor Precedent Sigma12 for the proposition that unrealized architecture is a codified record of potential, "not actual places, and not places held in reserve" (Sigma12, holding, second paragraph).

Against this, the Personnel Annex maintains that a space entered in the Register is held — that the Register is a schedule of custody, not a bibliography of intentions — and that the distinction matters practically, since only held spaces may be assigned an Omega Sequence. The Annex has never stated this position in a filing of its own. It appears only in the Register's marginalia, which the Guild of Spatial Adjusters has twice declined to treat as an interpretive source on the grounds that marginalia are not paginated.

"A lapsed space is not thereby a vacant one; the Tower does not vacate. What lapses is the intention, and what remains is the floor."

— Adept Marn of the Lower Register, Deleterious Spaces Proviso, preamble (draft)

Marn's proviso was drafted during Vertical Census 6 and has never been enacted. Its preamble is nonetheless quoted more often than the proviso itself, and the Chain of Custody Ledger cites it three times in support of propositions it does not obviously support.

Disputes of access and custody

The Register is not a public instrument. Access is by petition to the Personnel Annex, supported by a countersignature from the petitioner's custodial order. Annex Epsilon holds a standing countersignature for the resolution of rights disputes, and shares environmental monitoring of Annex 12c with Annex Γ; the arrangement is recorded in the Register under Volume 16, folio 212, where it is filed under unrealized despite concerning two rooms that certainly exist.

Two further offices claim an interest. The Custodial Office of Actualizations has petitioned to have the Register's lapsed entries mirrored in its own Register of Manifestations as negative confirmations, so that a reader of the Manifestations may see what was proposed on a floor and did not arrive. The Personnel Annex has rejected the petition four times on procedural grounds, most recently because the covering letter was folded in the wrong thirds. The Custodial Mandates meanwhile list the sectors in which the Register may be consulted, and include Custodial Spirals without stating which spiral, or on which floor.

Relation to other registers

The Register is one of several overlapping schedules of the not-built. Ledger of Unrealized Events, Vol. 117 records failed occurrences rather than failed spaces, though the two volumes share a compositor and, by coincidence, identical page signatures. The Linus Protocols govern the handling of entries whose originating office can no longer be identified; The Linus Protocols (Δ-114.1-22) adds a footnote requiring such entries to be re-read against the Tenet of Non-Accretion before any note is removed. In one recorded instance a clerk applied the footnote to Volume 18 and, on the strength of it, removed nothing at all over the course of a full winter. The entry was later found to have been correct.

As of the last survey the Register holds 4,118 entries, of which 391 are duplicated by interlineation in Interlinearation — an error traced to a single scribe working the night shift on the seventeenth landing, who is not named in the record and whose corrections the Personnel Annex has declined to accept.