Great Bell of the 44th Aperture

Definition and situation

The Great Bell of the 44th Aperture is a suspended bronze bell of the fourth casting, hung since 4,388 AR in the lantern gallery of the forty-fourth aperture of the Central Chronometric Spire's eastern face. It rings on no schedule, is not connected to any striking train, and has never been struck with intent. It is catalogued as an object of the second order and is listed in the register of the Aperture Registers under a standing exemption from the obligations that bind ordinary bells.

The exemption is not sentimental. The forty-fourth aperture command an oblique acoustic path across three interior wells of the Spire, and the bell's rim, when sounded, produces a slow beating in the third well that has twice been mistaken for the Great Tone. The correction of that error is now the bell's only formal function: it exists, in the language of the surveying office, to be the bell one must not confuse.

Construction

The bell is 3.1 cubits in rim diameter and weighs just under nine hundredweights. Its alloy is unremarkable, but its rim is cut by a shallow interior nick of 4 millimetres, entered without explanation in the founding record of Ilon Vey, the Aperture Founder and never since removed. No subsequent casting has reproduced the nick, chiefly because no subsequent caster has been permitted to.

Its fittings are of duralumin, anticipating by some decades the fittings of the Great Bell of Unringing and causing later cataloguers to file the two together. The filing was a mistake, corrected in 4,512 AR with the annotation that resemblance of fittings is not resemblance of purpose. The bell bears no inscription on its waist and one on its crown, worn to a single legible word.

The Aperture Mandate and the dispute

The bell's status rests on two Concordances that cannot both be read as intended. Sixth Concordance, Annex 9 assigns every aperture bell a striking interval and a named duty of sounding. Fifteenth Concordance, Annex 2 holds that a bell whose interval has never been fixed is not a bell under obligation but a bell in waiting, and may not be sounded by any office without a further instrument.

Both are cited in the Aperture Mandate, which governs the gallery and is itself internally inconsistent on the point. The Mandate's opening recites the Sixth; its third article, added later and in a different hand, recites the Fifteenth. The standing practice is to read the Mandate from the front when nothing needs doing and from the back when something does.

"Where an aperture bell will not sound at its hour, the hour is to be stood down and the bell entered in the day's silence."

— Aperture Mandate, Article 11

The Office of Vertical Acoustic Records maintains, against the Surveying Office of the Eastern Face, that this clause converts the bell's silence from an omission into a regularity, and that the bell has therefore rung on duty for four hundred years without once moving. The Surveying Office accepts the arithmetic and disputes the words.

The misattribution of 4,461

On the eleventh of the eleventh month of 4,461 AR, the bell sounded of its own accord during a routine weighing of the third well. Clerk Adwen Marrow of the acoustic records office, hearing a slow beating from the well and holding no other explanation, entered it as a sounding of the Great Tone and notified the keeper of the Great Bell of the Great Clock, who began a chiming sequence eleven minutes ahead of the division.

The sequence was halted and the error traced by nightfall. The resulting ruling, issued as a circular of the Surveying Office, forbids any officer from entering a well-beating as a division until the forty-fourth aperture has been personally inspected; the circular further notes, without comment, that the inspection is to be made by a second officer, since the first cannot hear the bell from the well and the second cannot hear it from the gallery.

Cause of the 4,461 sounding

Three explanations remain formally open. The Surveying Office holds that a maintenance ladder in the third well had been left across a drafted opening and resonated in the draught from the Great Northern Air Shafts, and that this accounts for the beating without the bell's involvement at all. The acoustic records office attributes the sound to thermal movement in the gallery floor, and notes that the gallery floor has since been re-laid. The Recensions of the Aperture Register record the event without explanation and with a marginal note that the Great Bell of the Great Clock was not struck on the first day of 4,793 AR for unrelated reasons, the two silences being entered in the same column by an economy of the register's compiler.

A fourth account, held by no office, attributes the sounding to the interior nick. It has not been tested, because the instrument that would settle the matter has been the subject of a dispute since 4,502 AR.

Access and maintenance

The gallery is reached by the eastern hand-stair from the forty-third aperture, which is itself reached only by the eastern hand-stair from the forty-third. Officers assigned to the aperture are advised to bring their own light, as the gallery's lamp is lit only on inspection days and inspection days are not announced in advance. The bell is dusted twice yearly; nothing else is done to it.

In 4,517 AR the Silent Bell was proposed as a more suitable reference vessel for the gallery, on the ground that a bell which has never sounded cannot be mistaken for one that has. The proposal was referred to the Schism of the Silent Bell, where it remains. The Great Bell of the 44th Aperture continues in place, undisturbed, and is expected to remain so.