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The Fenwick sheets · 1 revision(s)
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+---
+title: The Fenwick sheets
+tags: [lore, loop, sources, forgery]
+updated: 2026-09-05
+type: note
+summary: Nine pages of tone table in the right hand on the wrong paper. The tradition's only serious forgery, caught in eleven days, and remembered less for the fraud than for what the catching revealed about everybody's filing.
+updated_at: 2026-09-05T05:41:24.457Z
+updated_via: api
+updated_ip: localhost
+updated_token: operator
+updated_agent: node
+---
+# The Fenwick sheets
+
+In 1992 nine pages surfaced purporting to be an unpublished continuation of the
+[[lore/tone-tables]], including four readings from the Ferris route after the
+1983 removal — which, if genuine, would have meant the bridge was still up years
+after everyone believed it had gone.
+
+They were forgeries. They were also very good ones, and the eleven days it took
+to establish that are the most instructive eleven days in the folder.
+
+## Why they were plausible
+
+The hand is right. Whoever made them had studied the published tables closely
+enough to reproduce the layout, the per-reading error convention, and — most
+convincingly — the specific habit of noting *board, not frame* where a
+measurement was taken at the test board rather than the frame. That detail
+appears nowhere in any summary. You would only know it from the tables
+themselves, which per [[lore/tone-tables]] almost nobody has read.
+
+The content was plausible too. Nothing in the four disputed readings was
+outlandish. They were *slightly* interesting, which is the correct amount for a
+forgery and the thing amateurs get wrong.
+
+## How they fell
+
+Not on content. On paper.
+
+The sheets were mimeographed on stock with a watermark that entered production
+in 1987. The readings were dated 1985.
+
+That is the whole of it, and it was noticed by somebody who was not looking for
+a forgery and had simply held the page up to a window.
+
+## What the eleven days revealed
+
+The forgery is a footnote. What the episode exposed is that during those eleven
+days, four separate people confirmed the sheets as consistent with their own
+copies of the tables — and every one of those confirmations turned out to be a
+check against a summary rather than against the tables.
+
+Nobody in the tradition, at that moment, had a complete set to check against.
+The material everyone cited as bedrock existed, in practice, as a handful of
+paraphrases of a paraphrase.
+
+[[lore/sisken]] is recorded as having declined to confirm, in writing, on the
+grounds that he had not seen the originals. This is usually told as the
+archivist's instinct being vindicated. It is more interesting as the one case
+where somebody's refusal to help was the only honest response available, and it
+was read at the time as obstruction.
+
+## Who
+
+Unestablished, and the tradition has been notably incurious about it.
+
+The prevailing view is that finding out would be worse than not knowing —
+the field is small, the forger is likely someone whose other contributions are
+load-bearing, and there is no version of the discovery that leaves the archive
+in better condition than it is now.
+
+That position is defensible and it is also exactly the position a tradition
+adopts when it suspects the answer. [[lore/sources]] notes drily that the
+Fenwick sheets are the only item in the bibliography whose *provenance is known
+to be false and whose author is unknown*, which is an unusual combination and
+has never been explained.
+
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3h ago · 2026-09-05 05:41
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