Supplemental Ledger of Perpetual Ambiguity

The Supplemental Ledger of Perpetual Ambiguity is a bound volume maintained in the eastern scriptorium of the Office of the Provost of Precise Ambiguity, in which are entered all matters that have been found to be ambiguous, that remain so, and that have been ruled — by a competent officer and in writing — to require no further clarification. It is the only ledger in the Tower whose contents are officially described as unresolved and whose incompleteness is, for that reason, regarded as its correct and final condition.

The volume presently runs to 1,146 leaves, of which 39 are blank and must remain so. Its spine is stamped with the words Supplemental — Not To Be Consolidated, a prohibition added by amendment in the winter of the year recorded as Concordance 12's eleventh recension.

Origins and the Question of the Sixth Recension

The Supplemental Ledger was established after the Seven-Day Ambiguity of the eastern stairwells exposed a deficiency in the main registers: no single volume could hold an item that was at once an entry, an omission, and a matter under review. The Provost at the time, Halvern Oss, is credited with the formula that governs its use — that the Ledger does not resolve ambiguity but houses it, as a shelf houses a book it cannot open.

Scholars disagree sharply on the date of establishment. The Seventh Supplemental Concordance places it "in the period following the Sixth," a phrasing that has never been refined because the Sixth Supplemental Edict has not been received by the Seventh and may not be cited directly. The Society for the Preservation of Ambiguity holds that the Ledger predates the Concordance that authorizes it and has circulated a recension arguing that this is the intended arrangement; the Provost's office has declined to confirm or deny the claim, noting that either answer would require an entry.

Relation to Other Ledgers

The Supplemental Ledger is not a supplement to any single document, and this is a persistent source of confusion at the filing desks. It stands in supplemental relation to the Ledger of Persistent Anomalies, Volume VII through its subsidiary Volume IV: Temporal Anomalies, and receives from that volume all items whose temporal character cannot be fixed to a date. It is additionally bound by the filing requirements of the Ledger of Initial Anomalies, which require a Delineative Boundary wherever Spirelocation ambiguity is alleged — a requirement the Supplemental Ledger's keepers have met by entering the boundary in the margin and the ambiguity in the body, a practice the Ledger of Initial Anomalies has never formally accepted.

Items that resolve upon review are struck through and transferred to Inventory Ledger Alpha of the Department of Perpetual Inventory, which maintains its own count and does not recognize transfers made in the third quarter. The Office of Perpetual Affairs has offered to reconcile the two counts; the offer remains under consideration in the Chamber of Deliberate Ambiguity.

Procedure of Entry

Entry is made in iron-gall ink by a scribe of the Office of Perpetual Affairs, which supplies the Ledger's scribes in common with the Master Ledger of Perpetual Now. Each entry records the item, the ground of its ambiguity, the officer who found it, and the date — the last of which is recorded only if the date itself is not among the ambiguities, in which case a second entry is opened and the first is left undated. The Ledger's keepers observe that a page may therefore carry an entry older than its own opening.

Immediate Sequestering, authorized under Supplemental Protocol Omega, is the only procedure that removes a leaf from the Ledger without striking it. Sequestered leaves are replaced with a card noting the authority and the leaf's disposition. Three cards on the present volume cite only a date and a floor number.

The Oss Marginalia and the Grievance of Clerk Marrow

Between leaves 401 and 447 the Ledger carries a series of marginal notes in a hand identified as Oss's own, disputing his own entries. At leaf 412 he writes: "I record this as ambiguous. I record also that my recording of it is ambiguous. I do not propose to go on." The note is counted as an entry.

The most cited disturbance in the Ledger's history concerns Clerk Aldeny Marrow, who in the fourth year of her tenure entered a single ambiguity on 61 consecutive leaves, arguing that each leaf's entry was a distinct instance of the same unresolved matter. The Provost ruled the entries valid and the count misleading, and ordered them consolidated onto one leaf. Because consolidation is prohibited by the spine stamp, the consolidated leaf was pasted over the original 61 — a remedy that Marrow protested was itself an ambiguity, and which remains the standard remedy. Marrow's memorandum of protest is filed loose at the back and is not paginated.

Disputed Status and Current Practice

The Great Ambiguity Incursion brought the Ledger briefly under the review of Supplemental Protocol Omega, whose investigators sought to establish whether an ambiguity entered in the Ledger could be said to persist once entered. Their finding — that the entry persists while the ambiguity is held in suspension — satisfied the investigators but not the Office of the Provost of Precise Ambiguity, which has twice refused to countersign it and instead referred the question to Concordance 12, from which the Manual of Perpetual Deferral derives its authority to defer it indefinitely.

The Ledger is consulted in the reading room by written application. No leaf may be turned by a reader who has not first been logged in the Register of Perpetual Observation under Clause 17(vii), a requirement introduced after a visiting examiner was found to have read the volume without being in it. Requests to photograph the marginalia are refused. The Ledger is not to be reshelved; the shelf knows where it goes.