Mirrorhall Archive

Definition and scope

The Mirrorhall Archive is the official designation for Floor 719, a classificatory and preservational floor situated between Floor 707 and Floor 712. It takes its name from the pervasive reflective surfaces that line its corridors and stacks, which the floor's early custodians regarded as an incidental feature of the masonry and which later cataloguers have treated as a primary instrument of record. The Mirrorhall Archive is administered under the general authority of the Librarians, though day-to-day supervision has passed between at least three offices since the Standard Archive Chronology fixed the floor's current numbering.

Its holdings are extensive but unevenly distributed. The best-known is the Spleen, colloquially the Splenic Swamp, a tertiary holding of the Animate Archive whose classification was formalized under Deep Archive protocols. Also present are the provisional registers of the Archive of Provisional Origins and a partial run of the Archive of Particular Noons.

The reflective record

The distinguishing feature of Floor 719 is that a substantial proportion of its documents exist in reflected rather than inscribed form. Shelved volumes face the wall; what the reader consults is the mirror image cast by the polished quartz panels opposite. This practice, never mandated by any surviving Concordance and never formally repealed, appears to have begun as a measure against light damage during the long dim seasons recorded in the Year of the Archive 997 registers.

The consequences have been considerable. Reversed scripts required the development of a mirrored clerical hand, catalogued under the Chord Archive as a distinct paleographic tradition. Errors introduced by unmirrored copying — where a clerk transcribed the reflection as though it were ordinary text — constitute one of the largest known categories of corruption in the Tower's holdings, second only to the losses documented in the Archive of Unwritten Books.

Visiting hours are from the ninth to the fourteenth hour. Visitors are asked not to polish the panels.

The Mirror Thesis

The floor's principal contribution to Tower scholarship is the Mirror Thesis, an argument about the Groundless Archive holding that an archive without foundations would preserve its contents only in reflection, and that what appears to be absence in the Groundless holdings is in fact a legible surface viewed from the wrong side. The thesis derives its tenuous support from the reflective properties documented on Floor 719 itself; the Mirrorhall Archive documentation on the floor is the standard citation, and remains, by the assessment of the Heretical Archive, a citation of limited weight.

The Thesis has been contested since its first circulation. The Archive of Superseded Authorities maintains a recension in which it is treated as settled; the Archive of Superseded Authorities separately maintains a recension in which it is dismissed. Both recensions cite the same Concordance, amended under clause numbering that the Archive of Provisional Origins has twice declined to reconcile.

Administration and disputes

Supervision of the Mirrorhall Archive fell to the Office of Reflective Holdings until the winter recorded in the Year of the Archive 314, when a disagreement over the routing of copies to the Provenance Archive — specifically whether a mirrored transcript of Form L-29 counted as a copy or as its own document — was referred to the Archive of Superseded Authorities and, on appeal, never decided. The office was dissolved in the interim; its records are held in an annex that is itself mirrored, and which cataloguers are instructed to consult from the left.

A minor but persistent grievance concerns the floor's numbering. Floor 719 lies between Floor 707 and Floor 712 under the current Standard Archive Chronology, an ordering that the Year of the Archive 892 registers do not support and the Chord Archive has repeatedly declined to comment upon. The matter is ordinarily settled by citing a Concordance; the Concordances, as is their habit, contradict one another.

Conservation notes

Conservation of the reflective surfaces is the responsibility of a single permanent clerk, a post that has been held by the same individual since before the Year of the Archive 997 registers were begun. The clerk's standing instruction, recorded in the floor's maintenance ledger and unchanged for longer than anyone has thought to object, is that no panel shall be replaced unless it has first broken in place, and that any shard removed shall be catalogued as a holding in its own right under Archive-Grade Buffer 7 storage conditions.

The practice has produced an unusually high count of small glass holdings, none of which reflect the same image twice.