Assessors

The Assessors are the sworn membership of the Society of Crustrial Mechanics, an order dedicated to the applied study of the Tower's physical fabric. The title is not a rank but a qualification: an Assessor is any member who has passed the Society's Third Examination and been entered on the Crustrial Roll, and who is thereafter entitled to measure, sound, tap, and certify the surfaces of the Tower in the Society's name. Assessors are not builders. They do not repair what they assess, a prohibition restated in every recension of the Society's charter since the Seventh Concordance and enforced with unusual consistency. An Assessor who lays a hand on a defective wall in an official capacity is struck from the Roll; an Assessor who merely leans on one is reminded, once, in writing.

The order is old enough that its founding is disputed and recent enough that its internal feuds are still personal. It maintains no central hall. Its business is conducted in the corridors it inspects, and its records are kept wherever the last Assessor to hold them happened to be standing.

Origin and the question of the First Roll

The Society dates its foundation to the winter of the year recorded in its annals as 412, when a group of stone-sounders in the western stacks agreed to a common notation for describing cracks. Nothing survives of that agreement except its fourth clause, quoted in a marginal note by Hieronymous Selvage, who doubted the whole account: "A crack is a sentence the Tower has begun and not finished, and we are not its editors." Selvage's note calls the clause "too fine to be true," and his suspicion has never been settled. The earliest Roll that any Librarian has examined is a fragment covering eleven names, three of which appear to be the same person entered under different spellings.

The Society does not contest the fragment's authenticity. It contests its relevance. The official position, repeated in the Society's annual address without variation, is that the First Roll was lost in a stack-collapse and that the fragment is "a later courtesy." No Assessor has been able to say whose courtesy.

The Third Examination

Admission requires the Third Examination, a practical assessment conducted on an unlit floor chosen by the candidate's examiner and disclosed to no one in advance. The candidate is given a sounding-rod, a chalk line, and four hours. They are expected to produce a certificate describing the condition of the floor's fabric, its probable age, and any anomaly requiring referral. Grading is by three Assessors, one of whom must dissent as a matter of form; a unanimous result is returned ungraded and the examination repeated.

The examination is notorious for its failure rate and for the eccentricity of its prompts. In 703 a candidate on an unnumbered floor returned a certificate so precise that the grading Assessors could not fault it and struck the candidate on the grounds that "no fabric admits of faultless description" (''Minutes of the Third Examination, sealed annex''). The candidate, one Ovrin Tull, appealed to the Theoretical Jurisprudence Guild and won; the Society declined to be bound by the ruling and entered Tull on the Roll only after his death, "as a matter of record hygiene."

Grades and jurisdictions

Assessors are graded by the fabric they are licensed to certify. First-grade Assessors handle stairwells and landings. Second-grade handle load-bearing walls and the undersides of floors, which are assessed from below, often in poor light. Third-grade handle the Tower's apertures, thresholds, and other openings, and are the only grade permitted to certify absence — the finding that a thing required by inventory is not present where the inventory places it.

Grade does not determine authority. That is settled by jurisdiction, which is settled by the Aperture Assessors of Floor 419 whenever an opening is in dispute. The arrangement works poorly. The 812 dispute between a third-grade Assessor and the Office of Material Coherence over a sealed doorway on Floor 268 produced eleven conflicting certifications and no doorway. The Arch-Assessor of the Office of Material Coherence later ruled that all eleven were correct, "each in its own jurisdiction," and the doorway was recorded as present and absent in the same inventory, which remains the standard practice.

Relations with other bodies

Assessors are frequently seconded to offices that require an independent eye. The Office of Volitional Assessment and the Bureau of Perpetual Revision both draw Assessors for the Rite of Silent Assessment, though the two offices dispute which of them may draw first. The Assessors of Coincidence, who conduct field audits for the Clerks of Coincidence and the separate Office of Onomastic Coincidence, are often Crustrial members on loan; their authority to submit Form Π-44 by pneumatic tube or proxy derives from Concordance 14, Annex G, which codified informal protocols drafted by a coalition of clerks, indexers, and assessors and has been amended so often that its drafters would not recognize it.

Assessors also work alongside the Guild of Resonant Masons, though the two orders disagree about what a sounding-rod actually measures. The Masons hold that it reads the wall; the Assessors hold that it reads the rod. Neither has produced evidence the other accepts. Elara Sind, who came to the Wardenate from the Guild of Volumetric Assessors after years of cross-stack reconciliation, is frequently cited by both sides as a precedent, which she has asked them to stop doing.

Contradictions in the record

The Third Concordance treats Assessors as officers of the Tower and requires them to attend all structural deliberations. The Seventh Concordance treats them as private persons whose certifications carry no weight beyond the Society's own membership. Both remain in force. The Society's reading — that the Third governs the Assessor and the Seventh governs the certificate — satisfies no one and is repeated anyway.

Disagreement extends to the Society's relationship with Division VI: Unallocated Phenomena, which receives Assessor referrals of anomalies that resist classification. Division VI maintains that all such referrals are compulsory; the Society maintains that referral is discretionary and has produced a ledger of withheld cases to prove it. The ledger's entries are incomplete. The Society for the Preservation of Ambiguity has cited this incompleteness as evidence that the question should never be resolved, a position the Society finds unhelpful and the Division finds worse.

Conduct and minor provisions

Assessors on duty wear the Society's grey sash and carry a sounding-rod of regulation length, 1.4 metres, marked at intervals of one-tenth. Certificates are written in ink, never chalk, and signed with the Assessor's Roll number rather than their name — a rule introduced after the Society for Informed Ascent complained that named certifications were being read as endorsements of the climb. Assessors are forbidden to assess any floor on which they are currently resident. They may not accept hospitality from the Clerks of the Balanced Void while in session.

Soundings taken during the hours of darkness are entered as provisional until confirmed at the next daylight inspection, which on many floors is never. The resulting backlog is referred to in the Society's correspondence as "the unfinished sentence," a phrase Selvage would presumably have appreciated and which no one has seen fit to explain.