Crisis of the Fading Stair

The Crisis of the Fading Stair was an incident of 4,088 AR in which the principal staircase of Annex 7 lost structural intangibility at a rate later fixed at 2.4 centimetres of tread per hour. It is the founding event of the archive's literature on dissipative architecture, and the immediate cause of the formation of the Committee for Ephemeral Cohesion by instrument of the Fourth Concordance, Annex 12. Because the staircase in question did not, strictly, exist at the time of its disappearance, the Crisis remains the standard citation in disputes over whether a phenomenon can be said to have ended when it was never established to have begun.

Sequence of events

The Fading Stair was a corkscrew ascent between the seventh and eleventh landings of Annex 7, catalogued in 3,974 AR under the Survey of Interior Volutes as a "self-supporting spiral of indeterminate provenance." It was recorded as serviceable in the inspection returns of every year until the winter of 4,088, when the Night Steward of Annex 7, a clerk named Halvard Senn, reported that the fourth tread had ceased to bear weight while continuing to bear marks.

The degradation proceeded upward. By the ninth day the stair had retreated beyond the eleventh landing; by the twenty-second, only the handrail remained, and that only in the recollection of the two clerks who had used it. Senn's log for the period — the Senn Register, held at the annex's scriptorium and consulted chiefly for its margins — records the passage in a single line:

"Tread four absent to the foot, present to the eye, and the eye is not load-bearing. Have notified the floor above; the floor above has notified the floor above."

— Senn Register, entry for 14 Frostfair, 4,088 AR

No injury was recorded. The Committee's subsequent finding, issued in the Fifth Concordance under seal of the Office of Structural Regret, held that the Fading Stair had never been load-bearing in the sense alleged, and that its disappearance was therefore a correction of the record rather than a loss. This finding is cited in roughly one-third of all later cases involving the Theobold Principle.

The Sighing Stair and the residuum

Where the Fading Stair had stood, the surveyors of the Bureau of Vertical Reconciliation recorded a structural void: a shaft of maintained dimension from which a low, regular exhalation issued on a period of eleven seconds. This void was catalogued separately as the Sighing Stair and is regarded as the principal negative-space object of the annex. The Gareth of the Fading Stair phenomenon traverses it, and the Gareth of the Unsummed Column is understood as its spatial counterpart elsewhere in the Tower.

The Committee's residuum report noted that the void retained the acoustic properties of the stair it had replaced, including the characteristic footfall of clerks descending at speed. Researchers subsequently identified analogous dissipative qualities in The Fading Footfall, and the Chamber of Fading Impressions was reclassified from sensory holdings to structural ones on the strength of the comparison. Whether the Sighing Stair is the cause of the Fading or its residue has not been settled; the Committee has twice declined to hear the question, on the ground that it has already been answered.

Scholarly disagreement

The chronology is disputed. The Sixth Concordance, Annex 3, places the onset of the Crisis in 4,081 AR, seven years before the Senn Register's first entry, and attributes the intervening period to "the usual lag in annex reporting." The Third Concordance, Annex 9, assigns the event to 4,089 and describes Senn's log as retrospective. The Office of Reciprocal Citation has ruled that both dates are correct in their respective recensions and that citation of either without naming the recension is a defect of the record.

A second dispute concerns classification. The Columnar Emergents school holds that the Fading Stair was a Gareth phenomenon from the outset and that the Crisis is a naming error preserved by inertia; the Tract on Latent Administration, formalised in 4,112 AR in the wake of the Crisis of the Unbuilt Stair, inclines toward this view. The rival School of Prior Solid maintains that the stair existed robustly for a century and that its fading was contingent, avoidable, and — in the words of Dean Ossia Vane — "a failure of maintenance dressed in metaphysics." Vane's minority report is bound with the Committee's proceedings and is customarily read first.

Precedents and later use

The Crisis established several durable conventions. It was the first case in which the fading effect was held to be directional rather than reciprocal, a precedent extended in the Crisis of the Re-aligned Stair of Y201, where Guild intervention to optimise tread height produced topological disjunction on a pattern mirroring the fractional increases recorded in the Crisis of the Unbuilt Stair. Its governing principle — that the documentation of a fading phenomenon does not itself fade — is now administered by the Office of Reciprocal Citation and cited in the Fading Theorem of Reciprocal Negation as the sole exemption to that theorem's operation.

The Committee's standing instruction arising from the Crisis requires that any stair reported absent while still visible be marked with a paper sash and left unaltered for fourteen days. The sash is not to be removed by anyone below the rank of Under-Clerk, and never on a quiet one.

See also

• Crisis of the Shifting Stair
• Silent Divan Crisis
• Kaelen of the Unfinished Stair
• Adherents of the Fading Quill
• Floor 600: The Chamber of Fading Light