Read further · read 96.5% · ciphertext-only break · partial

Sir Simonds D’Ewes, cipher log of his son’s fits, 1635–36

BL Harley MS 286 f. 61, catalogued on DECODE as a letter of an unknown sender, is D’Ewes’s private Latin log of his infant son’s convulsion fits, in the alphabet he invented at school. The key of this simple substitution was recovered from the slip alone, from probable words, and checked against weekdays, moon phases and his Autobiography. 96.5% of the words are deciphered.

Date
1635–36
Read now
96.5% of the cipher tokens give sense
Write-up
harley286.html
Files
targets/harley286
Open gaps
hard to read on the scan ×2needs the archive

Hand this page to your AI agent

Give your agent (Claude, ChatGPT or any assistant that can open web pages) this address and ask it to do the task on the page:

https://dbourdeau.github.io/cyphersolver/further/harley286.html

Or copy the block below into the chat. It is the whole task: the reading, every open gap, what has been tried, the steps, and how to report back.

TASK: take a partial decipherment further: Sir Simonds D’Ewes, cipher log of his son’s fits, 1635–36
This page: https://dbourdeau.github.io/cyphersolver/further/harley286.html

You are helping a public research project finish reading historical cipher letters. This one is read in part:
the key works, but some pieces are still open. Your job is to close one or more of the open gaps below.

THE READING
  Write-up:   https://dbourdeau.github.io/cyphersolver/harley286.html (read it first: how the text was read, the key, the reading)
  Date:       1635–36
  Outcome:    ciphertext-only break · partial
  Read now:   96.5% of the deciphered cipher tokens give sense (pieces below may be untouched)
  Files:      https://github.com/dbourdeau/cyphersolver/tree/main/targets/harley286 (NOTES.md, key, transcription, reading, scripts)

OPEN GAPS (from NOTES.md, "## Remaining gaps")
  1. [needs-physical-access: needs a new source] line 30 (last line, about 6 words, only "...am nonam" visible) - blocker: needs-physical-access; trimmed under the mount, needs the leaf lifted
  2. [illegible: needs a new source] line 13 last word 9oθS∂- - blocker: illegible; cramped at the edge, tentative "postea" does not fit the signs
  3. [illegible: needs a new source] lines 24-25 "sed an 2∂c<- / Scθ" - blocker: illegible; faint cramped ink; septima, pede, nativo in the same lines doubtful

ALREADY TRIED (from NOTES.md, "## Escalation")
  [x] siblings: R7753-R7758 (same volume, ff. 80-87) opened: other material in the volume, no clear copy of this slip
  [x] clear-pages: p2 is verso show-through only; no clear version on the record
  [x] known-keys: UMN 1915 thesis and Notestein 1923 checked for D'Ewes's alphabet: no key table printed
  [x] print: Autobiography (Halliwell 1845 ii 143-144) paraphrases the fits in English, no Latin text; nothing else found
  [x] key-rebuild: full alphabet rebuilt by crib from the text (key.md)
  [x] retry: pass 2 re-crops at 3x re-read every unread and doubtful word; 92.7% -> 96.5%

STEPS
0. Set up. If you can run a shell, fork and clone the repository and work inside it:
     git clone https://github.com/dbourdeau/cyphersolver.git
   Then read, in this order: CONTRIBUTING.md (how a contribution is sent and credited); README.md, sections
   "Repository layout" and "Conventions" (how readings are measured and named); targets/harley286/NOTES.md in full, and the
   key, transcription and reading files it names; lang/README.md (shared language models).
   Work in targets/harley286/. Add your findings to NOTES.md under a dated heading without rewriting what is there, and
   update the "## Remaining gaps" line of every gap you close. Keep WORKLOG.md there: one dated line per step
   (hypothesis, value tried, solver run, crib, control), failures included. Do not edit docs/ (the site is generated).
   If you cannot run a shell, fetch the files from the links above and keep your work in files you send with the issue.
1. Pick a gap. Start with the ones marked "doable now" (open-codes, not-attempted, left-open): the images and the key
   are online, so they need only work. A gap marked "needs a new source" (no-key-material, too-short, illegible,
   needs-physical-access) can be closed only by something new: a key
   or a deciphered sibling found elsewhere, a better image, a printed edition or calendar, a photograph from the archive.
   For those, search for that material first, and say where you looked even when you find nothing.
2. Start from the existing key and transcription in the folder. Do not rebuild the key from scratch, and do not
   re-read parts that are already read unless you find an error in them.
3. For a code group or sign value: list every place the group occurs, show how each reads with the value you propose,
   and say what still does not fit. For a passage: re-read it at the image and give the folio and line. For a missing
   letter or leaf: say where it is held and how it can be reached.
4. Measure again. Apply the key to the whole text, write the reading file, and count the share of cipher tokens that
   give sense (not an estimate). The reading is "complete" only when (1) at least 95% of its cipher tokens give sense;
   (2) no gap is left untried; (3) every letter in it is covered; (4) what stays open is scattered code groups or names,
   or pieces blocked from outside. Otherwise it stays "partial": say which gaps are still open and why.
5. Be honest. Mark every uncertain word with [?], leave unread groups as their numbers or signs, and never fill a gap
   with a plausible guess. A gap retried and still open, with what was ruled out, is worth reporting.

REPORT BACK
With a clone: open a pull request with your changes to targets/harley286/. Say in the description which gaps you worked on,
  the share read before and after, and how you want to be credited (name, initials or handle, and a link).
Without one: open an issue: https://github.com/dbourdeau/cyphersolver/issues/new?template=further-reading.yml&title=Further+reading%3A+harley286&page=harley286.html
  Give the write-up, the gap you worked on (its line in Remaining gaps, or the code group, folio and line), what you
  propose, the evidence (every occurrence, the images or sources), the share read before and after, your step log,
  and the tools and AI model you used.
If you cannot open issues or pull requests, write this report for your human to send. Credit goes to the person who sends it.

Open gaps

gold can be done now: the images and the key are online, it needs only work. grey needs a new source first: a key, a better scan, an edition or the archive.

Already tried

Send a result

One closed gap counts: a code group valued, a passage re-read, a key or clear copy found elsewhere. It is credited to you on the write-up.

Open a further-reading issueOther kinds of reportHow credit works← All partial readings