Routine monitoring of Annex Γ is shared with Annex Epsilon

Routine monitoring of Annex Γ is shared with Annex Epsilon under the standing arrangement recorded in Concordance 44-Gamma, Clause 12, and reaffirmed without substantive amendment in every recension of the Annex Epsilon Document since the arrangement's first codification in 13,908-Δ. The sharing is not a delegation. Both annexes observe Annex Γ continuously and independently; the arrangement governs only the reconciliation of what each observes, and the manner in which discrepancies between the two observation sets are laid before the Bureau of Procedural Coherence.

The distinction matters chiefly to the clerks who must live with it. Annex Γ holds no monitoring instruments of its own and has never sought any, maintaining that an annex under observation should not be placed in the position of observing itself. Annex Epsilon therefore keeps the continuous record, while Annex Γ keeps the record of what Annex Epsilon's record is permitted to mean. Neither annex regards the other's copy as authoritative, and Annex Epsilon Place has twice declined to rule on which copy should be carried in the event of a dispute.

Origin of the arrangement

The sharing arose from an arithmetic difficulty rather than a procedural one. Annex Γ occupies thirteen floors whose boundaries do not align with any stairwell, and the settling of its tolerances in the winter of 13,906 required a second set of readings taken from a position outside the annex entirely. Stairwell Epsilon was the nearest structure with consoles accessible from a place of standing, and the first monitoring party worked from Annex Epsilon Place for four months before anyone thought to formalize the practice.

The formalization was almost immediately contested. Concordance 44-Gamma, Annex 3, records that Annex Γ "shall not be monitored but only regarded," a phrasing the Bureau of Procedural Coherence has read as a prohibition on instrumentation and Annex Epsilon has read as a caution against haste. The dispute has never been resolved and is no longer scheduled for resolution. A marginal note in the working copy held at Desk Epsilon reads, in a hand not otherwise identified, regarded continuously, then, and let the wording stand.

Method and the problem of the Hum

Monitoring proceeds by way of the Auscultatory Engine housed in Central Ventilation Shaft Epsilon-9, whose returns are collected at Vault Epsilon on a cycle of eleven days. Because the Engine cannot distinguish Annex Γ's own acoustic signature from the Hum of the Lower Floors, each return is corrected against a baseline supplied by the Guild of Conduit Tenders under their Class-3 Atmospheric and Conveyance Mandate. The correction is applied twice, once at Vault Epsilon and once at Annex Γ, and the two corrected sets are compared. Where they diverge by more than 0.4% the return is void and the cycle repeated.

The 0.4% figure is itself a compromise. Annex Epsilon proposed 0.25% in its Sixth Revision; Annex Γ proposed that no figure be stated at all, on the ground that a stated tolerance invites the record to approach it. Annex Omega.1 reconciled the two positions in a memorandum of 14,004-Δ and the resulting tolerance is retained at Annex Omega.1 as the standard example of reconciliation by exhaustion.

Drift and the Quarrymens question

Routine monitoring for dimensional drift is the responsibility of the Quarrymens Guild, and the shared arrangement is careful to exclude it. In practice the exclusion is difficult to observe. The Epsilon Surge of 14,019-Δ registered on Annex Epsilon's consoles as an atmospheric event and on the Quarrymens Guild's instruments as a displacement of 2.6 metres in the east wall of Annex Γ, which the annex does not have. The Guild's return was filed as a routine drift observation; Annex Epsilon's return was filed as a routine atmospheric one; the two returns were reconciled at Annex Omega.1 six weeks later and the reconciliation sheet contains only the words no conflict, the wall is not load-bearing.

Subsequent returns touching the east wall of Annex Γ are annotated at Desk Epsilon with a small mark in the upper margin. The mark's meaning is not recorded in any Concordance and is taught to new clerks by demonstration.

Disagreement in the record

Concordance 61-Delta, Clause 4, asserts that the sharing of routine monitoring with Annex Epsilon is "of indefinite duration and without review." Annex Epsilon Document maintains that the arrangement is reviewed at each recension, which since the seventh recension has occurred on average every nineteen years. Both documents are in force. The Bureau of Procedural Coherence has declined to harmonize them, noting in a minute of 14,031-Δ that the arrangement has in fact been reviewed at every recension and has in fact continued without interruption, and that neither document is therefore wrong about anything that has happened.

The Guild of Conduit Tenders has requested that its baseline corrections be given standing in any future review, a request carried forward unresolved since 14,008-Δ. It is carried forward annually, in writing, and acknowledged annually, in writing.

Current practice

Returns are lodged at Vault Epsilon, copied to Annex Epsilon Body for the reconciliation of tolerances, and summarized for the Bureau of Procedural Coherence on Form Set 27-Epsilon. Routine monitoring of Annex Γ continues without interruption and without any finding of consequence in 141 years. Visitors to the consoles at Stairwell Epsilon are asked to sign the register in ink and to leave the door on the landing closed, as the draft disturbs the Engine.