Causal Mechanics Chapter

The Causal Mechanics Chapter is a chartered body of the Librarian Order occupying Floors 3,041 through 3,047, and the only Chapter whose founding instrument predates the event it was founded to commemorate. It is charged with the measurement, certification, and, where permissible, reversal of causal sequences, and it maintains the Tower's standing registers of effect-before-cause. The Chapter is administered from the Long Bench on Floor 3,044 and reports jointly to the Directorate of Causal Forensics and to no one, a dual arrangement set out in Chapter 7, "Registry Protocols", which the Directorate has twice petitioned to have clarified without result.

Foundation and the Anterograde Charter

The Chapter's charter bears the seal of the Nineteenth Concordance and the date 11 Felting, though the Nineteenth Concordance was not promulgated until 14 Felting. The discrepancy is not treated as an error. The Chapter's own reading — recorded in its Anterograde Preface of 12 Felting — holds that a body founded to govern causal precedence is entitled to a founding document that precedes its own founding, and that to insist otherwise would beg the question.

"A Chapter that cannot precede itself cannot meaningfully regulate anything that does."

— Nineteenth Concordance, Annex 2, marginal gloss

The Literalist Chapter has disputed this reading continuously since 14 Felting, and in 61 Felting certified the Anterograde Preface as "an instrument dated before the ink that dates it," a finding the Causal Mechanics Chapter has declined to answer in writing. The dispute is now in its fourth century and is heard, by convention, in reverse order of filing.

Jurisdiction and the Doctrine of Prior Effect

The Chapter claims jurisdiction over all events occurring in the Tower that have already occurred, together with a narrow and contested jurisdiction over events that have not. Its working doctrine, the Doctrine of Prior Effect, holds that any effect recorded before its cause falls within the Chapter's remit, and that any effect recorded after its cause falls within its remit as well, on the grounds that the cause could not have produced it without supervision. The doctrine has been criticised as totalising. The Chapter has answered that criticism by noting that it is also correct.

Practically, the Chapter's officers — styled Causal Surveyors — patrol the register floors at intervals of nine days and annotate any sequence whose cause postdates its effect by more than four hours. Sequences exceeding forty days are escalated to the Long Bench and, if unreversed, entered in the Ledger of Premature Consequences, which currently runs to eleven volumes and is kept on Floor 3,046 behind a curtain. The curtain must not be drawn back during an audit.

The Chapter's persistent jurisdictional conflict with the Material Resonance Chapter arises from the latter's insistence that resonance precedes causation, and the former's insistence that resonance is a consequence, and the College of Ontological Mechanics' observation that both parties have been arguing in the same room for two hundred years and neither has yet produced a measurement.

Instruments and Certification

The Chapter maintains four certified instruments. The Anterograde Caliper, used to measure intervals that have not yet closed, is recalibrated at each equinox by the Chapter's Instrument Keeper, currently Instrument Keeper Sabel Onn, whose signature appears on every certificate issued since 88 Felting. The Retro-Causal Ripple Model, which the Chapter did not devise but has administered since the Directorate of Causal Forensics declined to, governs all filed reversals and is applied under the Principle of Causal Conservation: no reversal may be certified unless the total causal mass of the sequence is shown to have been redistributed and not destroyed. The Null Chronometer and the Reversing Sundial of Floor 3,043 complete the set, though the sundial has not been relied upon since the winter of 94 Felting, when it ran backwards for six days and the Chapter, finding nothing irregular, logged the interval as unremarkable.

The Matter of Surveyor Vey Tolm

In the winter of 212, Causal Surveyor Vey Tolm filed a routine annotation on Floor 3,045 noting that a dropped inkwell had broken eleven minutes before it struck the floor. The annotation was correct, properly sealed, and entered in the ordinary course. It was also entered, by a clerical slip in the scriptorium, as the cause of its own entry, whereupon the Ledger of Premature Consequences recorded the annotation as preceding the surveyor who made it. The resulting inquiry found that Vey Tolm had been employed by the Chapter for three years before being hired, a finding the Chapter accepted and the Directorate of Causal Forensics has never resolved. Vey Tolm remains in post. The Chapter has issued no further statement and considers the matter closed.

Disputes and Contradictions

The Chapter's authority rests on two Concordances that cannot both be applied. The Nineteenth Concordance, Annex 2, grants the Chapter original jurisdiction over all reversed sequences. The Twenty-Second Concordance, Annex 9, assigns the same jurisdiction to the Directorate of Causal Forensics and adds, in a clause the Chapter has annotated in red, that "the prior instrument is superseded in all particulars." The Chapter's position, maintained since 40 Felting, is that a superseding instrument promulgated after the instrument it supersedes cannot govern a Chapter founded before either. The Directorate's position is that this is precisely the sort of reasoning the Twenty-Second Concordance was written to prevent. Both offices cite Chapter 7, "Registry Protocols" in support, which supports neither.

In 137 the Chapter proposed, jointly with the Guild of Theoretical Mechanics Proposals, a numbered amendment resolving the conflict; it was returned unopened on the grounds that the Chapter's seal predated the envelope. The Chapter has not resubmitted.

Access and Holdings

The Chapter's reading room on Floor 3,044 is open to all Librarians in good standing. Visitors are asked to enter from the eastern door regardless of the direction from which they arrive, and to sign the register twice — once on entry and once, where practicable, before. The Chapter's holdings comprise the eleven volumes of the Ledger of Premature Consequences, the Anterograde Preface, the Causal Surveyors' Field Returns for the years 88 to 211, and a single chair, which is not to be moved.