pmt.report · Provisional Memoranda on Thaumaturgical Phenomena CLASSIFICATION: ARCHIVAL — CIRCULATION RESTRICTED
I
FRONTISPIECE · vol. iv · 03/xix/26
RESTRICTED distribution by clearance only

Provisional Memoranda on Thaumaturgical
Phenomena
— Quarterly Field Bulletin —

VolumeIV
SeriesCrepuscular
Compiled19 Mar 2026
Editor[REDACTED]
CuratorHesperus, M.
ImprintThe Greater Archive

The contents herein are submitted under provisional warrant. No claim is made as to the reproducibility of the phenomena described. Readers are advised to record their own observations in the lower margin and to disregard any apparent inconsistencies between editions.

III
FIELD REPORT · entry 0427
— Entry 0427 — Brumaire, Y. XCVII —

On the Decay Curves of
Inadvertent Sigils

The sigil discovered in the basement strata of Building K-7 had been etched into the underside of a service pipe, ostensibly as a maintenance tag. By the morning of the second day, instruments registered a measurable thaumic emission.

We arrived at the site at 04:12 with calibrated meters and a sealed quartz vessel. The emission profile decayed in a near-perfect exponential, half-life recorded at 17 minutes 9 seconds, until the device returned to baseline. Whether this constitutes a sigil in the technical sense, or merely the residual echo of one, remains an open question — a question the committee has elected, for the present, to leave unresolved.

“The instruments do not lie. The instruments are not, however, always speaking about what we believe them to be speaking about.” — Director Hesperus, internal correspondence, undated

A secondary survey, conducted with a separate set of instruments and independent observers, returned readings, suggesting either equipment fatigue, observer interference, or a property of the sigil that resists repeated measurement. The convention of the field permits all three explanations to coexist within the record.

τ — minutes since etching Φ — emission (a.u.)
FIG. 1 Exponential decay of inadvertent sigil emission, K-7. Peak thaumic output observed at lunar opposition. Variance unexplained.
A B C
FIG. 2 Reconstructed sigil geometry. Apex node A presumed primary; inversion observed at second observation.
VII
TABULATED ANOMALIES · 2nd quarter
— Inventory of Recorded Disturbances —

A Partial Census of
Provisional Anomalies

The following table is incomplete. Entries marked with the obelus (†) were omitted at the request of the relevant clearance officer; entries marked with the double dagger (‡) are presented in summary only, the underlying file having been transferred to the Greater Archive. The committee accepts that the record, as it stands, cannot be reconciled, and offers it without apology.

Designation Class Φ-Amplitude Disposition
0413 The Whistling Stair, Pelham II-b 0.62 ± 0.04 contained
0427 Inadvertent Sigil, K-7 I-c 2.18 ± 0.11 monitored
0431 Cellar Voice III-a † — ‡ sealed
0438 The Negative Library IV-d 0.04 ± 0.30 unstable
0442 Recursive Mirror, Brun. Refectory V-x do not approach
0451 Audible Geometry, Hall of Tides II-a 0.97 ± 0.02 recorded
0463 — ‡ — ‡ withheld

The table is closed for the present quarter. Subsequent entries, should they be admitted, will appear in the following bulletin or — if circumstances require — in a supplemental volume, distributed by hand.

XIII
REDACTED MEMORANDUM · for Curator's eyes
— Internal Distribution Only —

The Memorandum
That Is Mostly Not There

From[REDACTED]
ToOffice of the Curator
SubjectAnomaly 0442, status review
Filed19 Mar 2026, 03:14 local

Curator —

With reference to the standing inquiry, the recursive mirror in the Brunswick refectory has not, contrary to the third-quarter projection, . On the contrary, recent observations indicate and the duty officer has, in line with standing protocol, restricted access to the chamber.

I append below, for the record, the only statement we have been able to recover from the affected staff member. The transcription has been verified twice; the anomalies in punctuation are present in the original.

“We watched it fold the room. The room had always been folded. We were the new fold.”

Pending further instruction, I have suspended the routine survey and recalled both junior assistants from the site. The remainder of this memorandum, I regret to say, has been by order of the Curator's office, and is held in the secured supplement.

— Yours, in customary deference,
[REDACTED]

XLII
CLOSING APPARATUS · colophon
— Editorial Apparatus, Final Folio —

Colophon &
Standing Erratum

This volume was set in Playfair Display and Crimson Pro, with marginalia in JetBrains Mono and figure labels in Outfit. The compositor accepts no responsibility for the conduct of the document after publication.

i.

Standing Erratum

All instances of the word resolved appearing in this volume should be read as provisionally suspended. All instances of the word concluded should be read as .

ii.

A Note on Pagination

Folios II, IV–VI, VIII–XII, XIV–XLI, and the supplements numbered in Greek minuscule have been withheld from this distribution. Their absence is a feature of the present edition and not a printing error.

iii.

For the Curious Reader

Should the reader find that a folio appears or disappears between readings, this is — within reasonable tolerance — to be expected. Please record the variance in the lower margin and return the volume to the shelf from which it was taken.

SET Playfair Display · Crimson Pro · JetBrains Mono · Outfit
PRESS The Greater Archive, sub-basement IV
EDITION crepuscular · vol. iv · provisional
SEAL ⟁ — affixed by Hesperus, M., curator pro tem.

— fin., or as near to it as the present circumstances permit. —