ED-I-307-001

Definition and Classification

ED-I-307-001 is the designation assigned by the Bureau of Designation to a standing entry in the Register of Echoes, the first recorded under Instrument I of the Echoes Division and the first catalogued on Floor 307. The designation is read aloud as "Echo Divisional, Instrument One, Three-oh-seven, Entry One," though the Biographical Register of Minor Functionaries records that most clerks omit the "Entry" and say "ED-one-three-oh-seven-oh-oh-one" until corrected. It is the only Register entry whose text was recovered before its sound was, a circumstance treated in the Echoes Division as an ordinary filing irregularity rather than a defect.

In substance, ED-I-307-001 is the certified record of a single sustained echo — a phrase repeated at regular intervals by an unlocated source — heard on Floor 307 for a period no one has established the beginning of. The record consists of the phrase itself, its interval, its measured loudness in the Tower's standard units, and the testimony of fourteen Librarians who have heard it and eleven who have listened for it and report hearing nothing.

Recovery and Registration

The entry was opened by Vessaline Ord, then Clerk of the First Instrument in the Echoes Division, on 3 Ember 12 in the year 7-Mist. Ord had been dispatched to Floor 307 following a routine survey and returned with a written transcript before she returned with a certified acoustic reading, the reading having been mislaid in transit between the fourth landing and the survey office. Rather than delay the Register's first entry on that floor, Ord filed the transcript under Instrument I and appended a note in her own hand: "Sound to follow." The sound followed eleven days later and was filed as ED-I-307-001, Annex B.

The delay has never been formally forgiven. The Ancillary Register preserves a memorandum from the office of the Under-Librarian of Echoes, undated but attributed to Ord's successor by hand, which states plainly that "the first shall be complete or shall not be first." Ord's own reply, entered the same day, observes that the entry was in fact first and was therefore in no position to be otherwise. Both documents remain in force.

The Echo Itself

The phrase transcribed by Ord — and independently confirmed by nine of the fourteen hearing Librarians — is a fragment of spoken language too worn to assign meaning to. The transcript renders it as six syllables, the first three clear and the last three "dissolving into the floor." The interval is given in the Register as "between eleven and thirteen minutes, without regularity that has yet been measured," a formulation that has survived three attempts to replace it with a numeral.

Loudness is recorded as 0.4 standard units at the surveyor's standing position, though Ord's Annex B notes that "the reading rises to 0.7 when the listener stops waiting for it," a remark that later instruments have neither confirmed nor dismissed. The source has never been located. The floor plan for 307 shows the entry point as a corridor of ordinary width terminating in a wall of ordinary stone, and three expeditions have sounded that wall without finding a cavity behind it. The Echoes Division's standing instruction on the matter — printed on the survey cards issued for Floor 307 and nowhere else — is that listeners are not to strike the wall more than twice in an hour.

Interpretive Dispute

The central disagreement concerning ED-I-307-001 is whether it constitutes a manifestation or a repetition. The Register of Manifestations has twice petitioned to reclassify the entry, arguing in its second petition that a sound without a source is a manifestation by definition and that the Register of Echoes merely heard it first. The Echoes Division has resisted both petitions without stating grounds, prompting the Manifestations office to describe the refusal as "custody without argument."

The two Registers are governed by different instruments on the point. Concordant Law's Second Recension, Annex 9, holds that "an echo is the property of the floor on which it is heard," which supports the Echoes Division's position. The Third Concordance, however, provides in Annex 4 that "a sound lacking an origin is the property of no floor and falls to the general Register," which would remove the entry from Floor 307 entirely and, by implication, from the instrument Ord established there.

"We do not dispute that the sound is unoriginated. We dispute that unoriginated sounds are therefore homeless. A floor that hears a thing for long enough has heard it."

— Vessaline Ord, reply entered in the Ancillary Register, undated

A third position, advanced by the Register of Ephemeral Statutes in a note appended to its own copy of the entry, proposes that ED-I-307-001 be struck as "insufficiently present," on the grounds that eleven competent Librarians have failed to hear it. The Echoes Division has not replied to this note and has not removed the entry.

Associated Holdings

ED-I-307-001 is cross-referenced in several later holdings. The Chamber of Echoes cites it as the earliest example of an echo outliving its witness's certainty, and the Bureau of Epistolary Echoes has adopted its interval — "between eleven and thirteen minutes" — as the standard waiting period before a letter is presumed unanswered. A companion certification, Echoes from a Silent Bell, Certified, was filed in the same year and is often shelved beside the entry, though the two concern different floors and different sounds and have no demonstrated relation.

The entry's Annex A, a floor survey of Floor 307, was reissued in the year 9-Mist after the original plan was found to omit the corridor in which the echo is heard. The Bureau of Designation has ruled that the reissued survey does not supersede the original for purposes of the Register, with the result that the entry now cites a corridor its own attached plan does not show. The anomaly is noted in the Register of Irregular Acquisitions, which retains it as an example of a filing that "is correct in every particular and wrong as a whole."

Current Status

The entry remains open. It has not been amended since 9-Mist and has not been closed, the Echoes Division maintaining that closure requires a final hearing and that no final hearing has been scheduled. Listeners continue to be sent to Floor 307 at intervals; the survey cards are reissued each year with the instruction about the wall unchanged. Ord died in the year 14-Mist without revising her "Sound to follow" note, and the note stands in the Register as filed, followed eleven lines later by the sound.