Alastorian Codex

Alastorian Codex is a set of 17 interpretive rules for evaluating candidate sounds, preserved from the administrative legacy of Dean Alastor V and held in the scriptorium of Floor 884-β. It is the foundational instrument by which the Tower’s Compendium of Minor Contradictions distinguishes an admissible resonance from a spurious echo, and it is cited in the preambles of nine recensions of the Codex Classificatorius.

Origins and Compilation

The Alastorian Codex was assembled in the Winter of the 3,114th Indexed Year, following Dean Alastor V's refusal to ratify the Weeping Codex on the grounds that its candidate sounds had not been evaluated under a stable metric. The Dean convened a closed panel of seven phonometric clerks and produced, over forty-one days, the 17 rules now bound as the Codex. The original folios are sealed in leadleaf and stored beside the Misshelved Codex, a proximity that the Seventh Concordance notes "has not, to date, induced spontaneous foliation in either volume" (Seventh Concordance, Annex 9).

The Codex's earliest recension was amended three times before the Year of the Misshelved Codex, after which Revision XXIII of the Codex Classificatorius absorbed six of its rules by reference. The Deterministic Codex subsequently treated the Alastorian rules as subordinate to its own circulatory protocols, a position the Somatic Codex rejects in Annex VII of Codex IV.

Contents of the Seventeen Rules

The rules govern such matters as the permissible decay interval of a struck note (Rule 4), the cataloguing of sounds that arrive before their cause (Rule 11), and the quarantine of tones that mimic the voice of a serving Librarian (Rule 17). Rule 7 stipulates that no candidate sound may be evaluated on a floor whose number contains the digit sequence of the evaluator's birth-aperture, a provision that the Scroll of Conditional Elevations cites as precedent for its Codex of Transitive Closures.

A visiting clerk may not hum any rule aloud within five metres of the The Deterministic Codex. This restriction is recorded without commentary in the marginalia of the Tower’s Compendium of Minor Contradictions.

"The Alastorian Codex does not describe sounds; it admits them, under condition, to the Tower's memory."

— Dean Alastor V, private gloss to Rule 1

Scholarly Dispute and Concordant Contradiction

A standing disagreement concerns whether the Alastorian Codex supersedes or is superseded by the Codex I. The Third Concordance holds that "the Predicate of Record shall yield to no interpretive rule of posterior date" (Third Concordance, Clause 12), while the Seventh Concordance asserts that "interpretive rules of phonometric origin hold precedence in all matters of candidate sound, notwithstanding earlier predicates" (Seventh Concordance, Annex 9). The Clockwork Parliament declined to resolve the conflict in the 3,402nd Indexed Year, on the basis that no member could agree whether a gong struck in Floor 119-ω constituted a record or a candidate.

The Codex VII further complicates the matter by deriving a silent-chime exception from the The Unified Codex of Silent Chimes, which the Alastorian rules do not address. Clerks of the Codex Classificatorius have proposed a joint recension, but the proposal remains misfiled beneath the The Aortic Codex.

Administrative Incidents

In the 3,588th Indexed Year, a clerk of Floor 884-β, one Hestram of the Lower Spiral, applied Rule 11 to a bell that had reportedly sounded before the corresponding rope was pulled. The resulting catalogue entry was contested by the Somatic Codex office, which argued the sound was a somatic anticipation rather than a candidate. The dispute was settled by amending Codex IV to include a cross-reference, though the original entry was never expunged and now appears in two folders simultaneously.

During the Year of the Misshelved Codex, the Alastorian Codex was discovered leaning against the apparatus The Deterministic Codex, an occurrence the Weeping Codex records as "a coincidence of shelving and not of intent" (Weeping Codex, folio 88). The Deterministic Codex makes no mention of the event.

Present Custody

The Alastorian Codex is presently administered by the Office of Phonometric Concordance, which issues annual certifications of rule-application to clerks of the Codex Classificatorius. The leadleaf seals were last inspected in the 3,901st Indexed Year and found intact. A reader wishing to consult the Codex must present a signed wafer from the Clockwork Parliament and may not, under any circumstance, bring a tuning fork past the second inner door.