Atlas of Verified Access Points

The Atlas of Verified Access Points is a biennial cartographic publication of the Librarians’ Surveyor-Cartographer Guild, issued from a scriptorium on Floor 317 and distributed under seal to expeditionary parties before any descent or ascent beyond the ninth register. It records, in tabular and plan form, every Ingress Point whose position the Guild has confirmed by direct inspection during the preceding two years, together with the access date, the inspecting surveyor, and the floor of verification. It is the standard instrument by which a route is said to be entered rather than merely supposed, and no expedition may lodge a return against a point that does not appear in its most recent recension.

An access point is not listed in the Atlas until it has been re-entered twice from the same side and re-entered once from the opposite side, the latter by a surveyor other than the first. A point that satisfies the first condition but not the second is entered in the Guild's provisional register and does not appear in the Atlas at all. This is intended to catch the class of door that admits a party and declines to readmit it. It catches such doors reliably, and has never yet caught anything else.

Format and recensions

The Atlas is issued in a folio impression, three hundred and eleven leaves, of which the first forty are given over to the register of points by floor number and the remainder to plans of the approaches. The plans are drawn to a scale of one inch to four spans and are folded, not bound, so that a party may carry only the leaves relevant to its route. The binding board is stamped with the recension year and a numeral; the numerals are not consecutive, and recensions are distinguished in practice by the name of the ruling surveyor rather than by number.

Supplements are issued quarterly on loose leaves and are inserted, not pasted, into the folio. Pasted supplements invalidate the impression. A party returning with a pasted impression has its account of a route queried and, in three historical instances, disallowed entirely.

Provisioning access and Access Point 22-Delta

Because expeditionary supply is drawn through dedicated access points, the Atlas carries a separate schedule, the Provisioning Schedule, listing those points cleared for freight rather than persons. Provisioning access and ingress of personnel are verified separately, and a point may be verified for one and not the other; the distinction is not always observed by parties in the field, which is the origin of the Access Rotation dispute.

The most heavily annotated entry in the current impression is Access Point 22-Delta, through which the Proctorate draws its stores. The 22-Delta entry has been corrected in five successive recensions without the underlying point moving, a circumstance the Guild attributes to the point's habit of presenting its threshold at a slight angle to the floor plane. The current entry carries the footnote: Approach on the left foot. Right-foot approach is recorded, and is not refused.

The Delta entry and the procedural float

Stairwell Delta was placed under procedural float by Concordance 41, Recension 3 and the Guild's surveyors were instructed to continue plotting its access points during the suspension, contrary to the ordinary rule under which an unfixed stairwell is struck from the Atlas. The resulting necessarily irreconcilable sheets were bound separately as the Atlas of Unfixed Points, Vol. VII, which the Guild has never reprinted and does not distribute.

The Guild's position on this bifurcation is stated in the 22-Delta headnote: A point may be verified at a location that is itself unfixed. The verification attaches to the point. The Clerks of the Seventh Spiral have objected in writing that this reasoning, if permitted to stand, would verify an access point into a room that had been declared absent. Their memorandum of the winter of the ninth recension is appended to the Atlas as Appendix DD and is not cross-referenced from the body of the work.

Disputes of authority

The Atlas's authority is not settled between the Guilds. Concordance 743, Annex 9, which formalised Verified Permanence for the Atlas of Silent Geographies, is read by the Guild's advocates as establishing that a verified access point holds its position independently of the party that verified it. The Inquest recension of the same annex is read by others as limiting that independence to holdings, not to points, and therefore leaving the Atlas a record and not an instrument.

The practical consequence is that a party which enters a floor by a point listed in the Atlas and finds the point no longer present has two recourses, mutually exclusive. It may petition for correction of the Atlas, or it may report the discrepancy to the registrar as a Paradox of the Verified Holding. Petitions for correction are heard first; reports of paradox are heard second. A party that files both is heard third, and the hearing addresses only the filing.

The Guild additionally maintains that the Atlas records access and does not grant it, a position the Ordinance of Interposed Pathways does not expressly contradict and the Tome of Fixed Points does not expressly support. No decision has resolved the matter, and the Atlas's own preamble declines to describe the Atlas's own standing.

Expeditionary use and known limitations

Before departure, the expedition's cartographer must confirm in the margin of the folio that every point on the proposed route appears in the current impression and in no supplement issued after it. Points appearing in both are entered twice in the route ledger, and the party must state which entry it intends to use. A party that cannot state this does not depart.

The Atlas does not list points onto Floor 501, which cannot be plotted in advance and which are recorded only after the fact by the officers in whose rooms they manifest. Nor does it list points into the Apertures, whose entries the Guild has twice attempted and twice withdrawn, the second withdrawal accompanied by a note that the points in question were verified from a floor that could not afterwards be located. The corresponding leaves remain in the slate-printed proof impression held on Floor 317, which is shown to visitors on request and on no account lent. The Atlas is currently between recensions; the last was issued in the ninth year of the present administration, and the next is expected when the verification of Access Point 22-Delta is completed or abandoned.