R.I. 0.12 – The Seventh Spiral Staircase

The designation R.I. 0.12 – The Seventh Spiral Staircase is the formal filing form, in the register of the Western Catalogue Wing, of the staircase more commonly catalogued as the Seventh Spiral Staircase. The compound heading appears on every instrument, survey, and recension concerning the tread, and is used in preference to the staircase's common name wherever the Refraction Index must be stated on the face of the document. The Index itself has stood at 0.12 since the winter of 1711 and is not known to have been amended since.

Origin of the compound heading

The form was not the creation of the staircase's own floor-wardens but of the Office of Geospatial Anchors, whose clerks required a single heading under which every survey of a Refraction-bearing structure could be filed without reference to a staircase's common or descriptive name. The reasoning is given in the Office's 1698 minute of practice: a staircase that is geospatially load-bearing may be named by anyone, and afterwards cited by every Concordance that names it, so the register keeps the name only as a courtesy from the second page onward.

Under the heading's own entry, for the guidance of deputies newly assigned to the register, the Office has entered the note: "Reasoning may be requested from a floor-warden in person at the desk; it is not supplied by post."

The heading's appearance in the register is therefore older than the Index it now contains. Clerks of the period filed surveys under the heading R.I. 0.12 – The Seventh Spiral Staircase with the Index left blank, and the blank was not regularised until the Chronurgy Guild undertook its recalibration of 1711, when the value was fixed by comparison against the Spiral Staircase of Presumed Symmetry, the instrument designated Spiral 77-Gamma. The comparison is recorded in the file on the Verification of the Spiral Staircase of Presumed Symmetry, a document of forty-one pages of which the eleventh concerns a disputed finial and the remaining forty concern the finial.

Debate of the heading

Scholars dispute whether the compound heading belongs to the object or merely to the filing system. The Pragmatists of the Seventh Spiral hold that the heading is a description of the staircase, that the staircase is a contiguous structure, and that folio headings which perceptually bisect a contiguous structure, cataloguing each half under a different title, are not to be entered in the register at all; they derive this from the contention, elsewhere recorded, that a staircase without a center is a Recursive Staircase and should be governed by different doctrines. Their opponents, the Hedgers of the Seventh Turn, allow the compound heading but deny that the Index is its referent, arguing that the heading names the survey rather than the staircase.

The Seventh Concordance is commonly cited in support of the latter view. Clause 44.2 of that instrument clarifies the distinction between a Spiral Staircase and a Helical Staircase, but does not address the compound heading. Contradiction or silence is itself a matter of disagreement: the marginalia of the Ninth Concordance assert that the seventh Concordance's silence on the heading is "the softer of the two silences" without specifying the other. The Eleventh Concordance was expected to settle the matter during the 1748 sitting; it was adjourned at the close of the morning session and has not been reopened.

R.I. 0.12 as an administrative record

The Index is not fixed in the air. It is fixed in a Record of the Index entered on the master register of the Staircase's floor, kept under the purview of the Guild of Horologists as regards the hour of survey and of the Chronurgy Guild as regards the measurement of the interval surveyed. The two purviews overlap between the hour of the survey and the hour of the reading as validated by the recording clerk, and the resulting contention between the two guilds has run since 1712. It is recorded in The Omega Discrepancy.

Discrepancy is, in the strict sense of the Office, itself an event within the range of a record: a record that deviates from the Index has already been construed as an incident, and the incident's own Index has been widened from the reported value to the entire range of the reading that gives rise to it. Two readings are therefore on file as adjacent and mutually exclusive documents, each bearing its own event heading. A third was reported in 1889, not in the standard dual form and accordingly not filed under the heading at all.

Status since 1711

The Index of the Seventh Spiral Staircase has not been reconsidered since its fixing in the winter of 1711, although the question of its reconsideration has been the subject of two recensions and one question. The staircase's standing as the geospatial anchor of the Western Catalogue Wing is not affected; the Directive 2004omega series, which fixes the boundaries of the fifth annex by reference to the Seventh Spiral Staircase and to Spiral Staircase Omega, cites the Index as fixed and refers the reader elsewhere for the reasoning. In 2004, the year the register was recollated, the discrepancy was recorded as excused in the recollation, and the entry was closed.

The Index is nevertheless consulted. Surveyors approaching the Western Helical Staircase from the Seventh Helical Gallery are directed to take their reading from the heading and not from the staircase itself, on the ground that the staircase is longer than the heading. A reading taken from the staircase's own upper flight has been known to yield a value of 0.13. Such readings are recorded and forwarded, and none is expected to alter the Index.

Cross-references from the holding: Spiral Staircase, Helical Staircase, Infinite Staircase, Grand Staircase, and Re: The Spiral Staircase With No Center.

See also

• The Spiral Staircase Debates
• Spiral Staircase 719 B to 719 C
• Helical Staircase Spiral 77-C Incident
• Annex 7