addenda — internal memoranda, selected
The registry maintains an internal series of brief memoranda documenting observations that, at the time of writing, did not warrant a formal report but were considered worth preserving in the analytical record. A small selection of these memos is reproduced below in the form in which they were originally circulated. Some passages have been redacted by the registrar prior to publication. References to specific institutional correspondents are not given.
Memos are presented in reverse chronological order. Cross-referenced accession identifiers link to the corresponding catalogue entries.
subject: On the declining submission rate and its effect on cross-reference work
Annual submission counts have continued the downward trend first noted in the 2020 review. The 2025 total of eight records is the lowest since the registry's founding year; the partial 2026 figure of nine, recorded as of the end of May, is consistent with a comparable annual outcome. No administrative cause has been identified. Correspondence with the two principal feeder collections at indicates no change in their internal disposal practices.
The practical consequence is a reduced rate of new candidate material for the standing cross-reference investigations. In particular, the 612 cm⁻¹ phosphate occurrence first logged against AM-2009-10012-A and AM-2012-00007-A has not been extended by any 2024-2026 phosphate submission, despite four such submissions having been measured under the reduced-noise protocol. The magnetisation-persistence cohort anchored on AM-2011-02244-C is similarly static.
Registrars are reminded that re-pass work on existing accessions remains the principal means by which the catalogue advances during periods of low intake, and that the second-pass backlog from 2019-2021 is not yet cleared. Submission packets arriving without provenance documentation are to be accessioned under the usual procedure and are not to be deprioritised on grounds of incomplete paperwork. No further action is proposed at this time.
archive ref · memo.2026.004.txt · 1.4 KB · OCR pass 2
subject: On declining annual submission counts, 2022-2026
Submission volume has continued its monotonic decline since 2017. The current year is on pace to fall below the 2025 figure, which itself represents the lowest annual intake since the registry's first full year of operation. No corresponding change in intake protocol, public-facing documentation, or contact channel has been recorded over the relevant interval. The pattern is noted without interpretation.
Of the nine 2026 records logged to date, six are plain submissions of common species (calcite, talc, topaz, native copper) and three are provisional pending second-pass characterisation. None have so far attracted anomaly classification. The proportion of anomaly-bearing submissions across the 2022-2026 window now stands at approximately percent, a figure consistent with the long-term mean and providing no evidence that the decline is selective with respect to anomalous material.
For reference, the present anomaly catalogue remains dominated by submissions from the 2009-2012 interval (AM-2009-10012-A, AM-2010-10001-B, AM-2011-02244-C, AM-2012-10018-A among others). No incoming 2026 packet has yet been routed to the secondary site. Administrative recommendation: maintain current intake procedures without modification, and revisit the trend at the close of the calendar year. Correspondence received from regarding the reduced intake has been acknowledged and filed without further action.
archive ref · memo.2026.003.txt · 1.4 KB · OCR pass 1
subject: On the declining annual submission rate and projected 2026 intake
The annual submission count has now decreased in each of the last five complete years. Intake for 2025 closed at eight records, the lowest figure recorded since the registry's first operational year. Partial intake for 2026 stands at nine as of the present month; extrapolation against the historical seasonal distribution suggests a year-end figure between fourteen and seventeen, contingent on the usual autumn submission cluster from .
The composition of recent intake has also shifted. Of the nine 2026 records to date, none have been forwarded for anomaly review, and the most recent record carrying a flagged feature remains AM-2012-10018-A. Submission packets arriving without provenance documentation continue to account for a disproportionate share of recent intake; three of the nine 2026 packets contained no accompanying material beyond the specimen itself, and one contained a single hand-written wavenumber on unheaded paper. No correlation has been established between provenance completeness and subsequent anomaly classification.
For housekeeping purposes, the secondary-site re-pass queue presently holds two carry-over records from the 2010-2012 cohort, AM-2010-10001-B and AM-2012-10005-A, both awaiting instrument availability. No reallocation of registrar time is proposed at this stage; the declining intake has been absorbed without backlog. The matter is noted for the archive and will be revisited at year-end.
archive ref · memo.2026.002.txt · 1.4 KB · OCR pass 2
subject: On the declining annual submission rate and re-pass backlog
Submission counts have decreased monotonically since the 2016 peak (29 records) to seven records logged year-to-date for 2026. The rate of decline over the last four reporting years is steeper than that observed between 2017 and 2021 and cannot be attributed to a single intake channel; both the principal post box at and the secondary drop at show comparable proportional decreases. No correlation has been established between the decline in raw submissions and the rate of incoming packets carrying anomalous features; the proportion of latter has, if anything, risen marginally.
A secondary administrative concern is noted. The re-pass queue for fluorite records of interest, namely AM-2013-10001-B, AM-2016-00744-A and AM-2019-10001-C, has not advanced since the last instrument calibration cycle. The reduced-noise instrument at the secondary site remains committed to scheduled work on the scheelite cohort (AM-2017-03404-C) until the close of the present quarter. Re-pass of the fluorite group is therefore deferred; the registrar of record has been notified.
Recommendation: intake volume is not, in itself, grounds for procedural change, and no outreach is to be initiated. The backlog, however, warrants reallocation of one weekly instrument session from routine plain-record characterisation to the deferred fluorite re-pass, beginning the next calibration cycle. The matter is to be revisited at the close of 2026.
archive ref · memo.2026.001.txt · 1.5 KB · OCR pass 2
subject: Preliminary observations regarding records of class V
With the assignment of AM-2021-00017-A to class V on 2021-02-17, the registry now holds 1 record under this designation. The promotion follows three independent analytical passes (raman; XRD; EDX) at between 2021-02-04 and 2021-02-15, none of which converged on a description.
The Raman signature of this specimen contains the unattributed 612 cm⁻¹ feature first noted in memo 2014/118, in the context of a peak structure otherwise unassociated with any reference material in the registry's working library. The submitter has declined further contact. The specimen remains in registrar custody under standard preservation conditions; access is restricted to active observers.
A cautionary note is appropriate here: the registry is mindful that the historical accumulation of class III and IV records, together with the present class V record, presents a pattern that . We do not draw further conclusions in this memo. The records are kept open and the data is available for outside scrutiny.
archive ref · memo.2021.007.txt · 1.0 KB · OCR pass 3 · partially redacted at registrar's request
subject: Cross-correlated submissions across distinct submitter hashes
A periodic review of the cross-reference graph has identified a small subset of records ( in number) whose observed anomalies cluster across submitter hashes that, by the registry's anonymisation policy, should be statistically independent. The records in question span the period 2012–2019 and include contributions from at least different submitters as identified by hash prefix.
The clustering does not, in itself, suggest coordination among submitters; it may reflect a real underlying property of the material population from which submissions are drawn. However, we record the observation here for the avoidance of doubt. Where the clustering can be associated with a specific analytical signature, it is documented in the relevant record's notes.
archive ref · memo.2019.201.txt · 785 B · OCR pass 2
subject: On the persistence of anomalous magnetic states (Class III)
The behaviour reported under AM-2012-00833-A has been independently re-tested at three facilities (, , ) over the period 2014–2017. All three returned demagnetisation curves consistent with the original measurement. The persistent magnetisation has now been reproduced at four independent sites, including the original.
We note in passing that the registrar has been unable to obtain a published reference for an iron sulfide phase that would account simultaneously for the EDX-derived stoichiometry, the observed Mohs hardness, and the magnetisation curve. The submitter, on being contacted, declined to expand on the original provenance note. The matter is left open.
archive ref · memo.2017.044.txt · 724 B · OCR pass 2
subject: Recurrence of unattributed Raman feature near 612 cm⁻¹
Following the second occurrence of an unattributed Raman feature near 612 cm⁻¹ across two specimens of compositionally and geographically unrelated provenance (cf. AM-2008-04471-B and the subsequently re-analysed material recorded under AM-2019-04471-A), an inquiry was opened with regarding the possibility of instrument cross-contamination during the intermediate analytical pass. A response was received 2014-09-22 ruling this out on procedural grounds; the relevant calibration logs are retained internally.
The feature has since been observed in further specimens. Its position is invariant within the 0.4 cm⁻¹ spectral resolution of the routine pass; its relative intensity varies. Continued monitoring is recommended. No structural assignment is offered at this time.
archive ref · memo.2014.118.txt · 828 B · OCR pass 2
further memoranda
The above selection presently comprises 8 of the approximately 550 memoranda held in the registry's internal series. The selection is not exhaustive and reflects the registrar's judgement as to which items are of standing interest to outside readers. Requests for specific items by archive reference may be directed via the channel listed in methodology.