Monsieur, je ne sçay ce que vous pensez faire d’attendre si long temps à faire partir ceux qu[i] doivent aller…

BnF Dupuy 61 · contributed by George Lasry · French

M. de Villeroy to M. de La Verrière, 19 July; year not written

Nicolas de Neufville, seigneur de Villeroy
fromNicolas de Neufville, seigneur de Villeroy

Villeroy presses for the Rome mission to leave without delay, warns of Spanish forces and unrest in Paris, and discusses Mayenne and a possible truce. Deciphered by George Lasry, working with ChatGPT Astra 6 and Anthropic Opus 5.5, in his BnF cipher research of October 2026: 1164 elements, 1147 identified (98.5%).

George Lasry · posted · updated

Method: key recovered based on adjacent plaintext · Extent: complete

Contributed by George Lasry (solution)

George Lasry’s decipherment

George Lasry’s report on this item, as he sent it on 24 October 2026 (PDF), in its own order and wording. The decipherment, the translation and the reconstruction of the key are his, made with ChatGPT Astra 6 and Anthropic Opus 5.5. This project’s own checks follow under Verification.

Dupuy 61 — Villeroy, f258r

Contents: Villeroy presses for the Rome mission to leave without delay, warns of Spanish forces and unrest in Paris, and discusses Mayenne and a possible truce.

2/2 pages transcribed; Deciphered

Ciphertext-only:
No
Sender:
M. de Villeroy
Recipient:
M. de La Verrière
Year:
19 July; year not written
Key:
127 codes, 98 homophones, 29 in nomenclature; unmarked numbers ≥ 121 are nulls
Ciphertext:
1164 elements, 1147 identified (98.5%)
Interlinear plaintext:
Numerical letter only: Historical interlinear decipherment on f258r,colourPDF527/Gallica525.
Key elsewhere:
Volume unknown: original key image in the local Nevers archive. Matches 82 entries used in the numerical letter on f258r.
The reconstructed key, from George Lasry’s report.
The reconstructed key, from George Lasry’s report. Image: key reconstructed by George Lasry (report, 24 October 2026); sign images: Bibliothèque nationale de France, Dupuy 61, via Gallica.

Excerpt and Translation

f258r

The manuscript lines of the excerpt (f258r). Gallica f258r.
The manuscript lines of the excerpt (f258r). Gallica f258r. Image: Bibliothèque nationale de France, Dupuy 61, f258r, via Gallica; crop from George Lasry’s report.

Excerpt

Monsieur, je ne sçay ce que vous pensez faire d’attendre si long temps à faire partir ceux qu[i] doivent aller à Rome. On s’abuze si on pense de pouvoir faire autrement, et ces longueurs prejudicient infiniment, et semble par là qu’on ne desire qu’on effectue […]

Translation

Sir, I do not know what you think you will achieve by waiting so long to send off those who must go to Rome. It is a mistake to think that things can be done otherwise; these delays cause immense harm, and make it appear that there is no desire to carry out […]

Readable text

The full text, folio by folio, as in the report. Bold marks the passages deciphered from the cipher; the rest is the clear text of the letter. Question marks are the report’s: [?] or a bare ? for a sign or group left unread, a ? after a word for a doubtful reading.

Dupuy 61 — Villeroy

f258r

De V. à Monsieur de La Verrière.

Monsieur, je ne sçay ce que vous pensez faire d’attendre si long temps à faire partir ceux qu[i] doivent aller à Rome. On s’abuze si on pense de pouvoir faire autrement, et ces longueurs prejudicient infiniment, et semble par là qu’on ne desire qu’on effectue ce qui est commencé.

Je vous suppl[i]e d’escrire au Roy que si les choses ne succedent comme il les estoient proposez, defaillant ce moyen de Rome, qu’il ne m’en accuse, et que, prolongeant comme il faict, qu’il sera tout esbahy qu’il aura les Espagnolz sur les bras qui reviendront, et lors je ne sçay si nous serons maistres des volontez.

Je vous prie luy dire que ce n’est pour l’intemider comme quelquesfois il m’a voulu accuser, mais la crainte que j’y ay et que je veoy les affaires disposées me le font dire. Et cependant qu’on est en bonne volonté, on ne la doibt laisser escouler.

Je suis sur le point de m’en aller à Paris où il n’y a faulte de remuemens, et espere que dans ceste semaine M. de Mayenne sera où nous verrons ce qu’on pourra faire. Pour ce que ? avez escrit, mais vous ne m’avez fait responce si d’une part on le vouldroit ?.

Je vous prie de dire à ceux qui peuvent au faict dudit voyage pour le faire haster, que je veois bien qu’ilz ne recognoissent l’inportance de ce faict et qu’on fer[a] croire qu’on ne la desire. À l’honneur de Dieu, qu’on se haste, et le prie vous avoir en sa garde. Ce dixneufme juillet.

Par les motz qui sont sur la fin de la lettre, il entend de la trefve ou suspension d’armes.

f258v

Du chiffre de Monsieur de La Verrière.

At a glanceKey from adjacent plaintext · complete

The letter
M. de Villeroy to M. de La Verrière, 19 July (year not written); two pages in numbers.
Where
Bibliotèque nationale de France, Dupuy 61, f. 258r (Gallica).
The cipher
A numerical code of 127 codes: 98 homophones and 29 nomenclature items; unmarked numbers of 121 and above are nulls.
How it was read
The letter carries a contemporary interlinear decipherment, which gives the key. The original key image is in the local Nevers archive, volume unknown. This project checked one sample against the Gallica image and did not re-solve it.
What it says
Villeroy complains that waiting so long to send off those who must go to Rome is a mistake and that the delays do great harm.
Still open
1147 of 1164 cipher elements are identified (98.5%).
Credit
The result is George Lasry’s (BnF cipher research, 10 October 2026).

01 Verification

Spot-check against the manuscript

This result is George Lasry’s. This project did not re-solve the cipher: it checked one sample against the Gallica image and recorded what it found.

02 Other contributions

Where a decipherment or clear copy already existed, as George Lasry gives it:

Interlinear plaintext
Numerical letter only: Historical interlinear decipherment on f258r,colourPDF527/Gallica525.

Full texts

The transcription and the decryption of every document on this page, so that the reading can be used and checked. Short files are shown here; all are in the repository.

George Lasry's decipherment (report PDF, 24 Oct 2026)

M. de Villeroy to M. de La Verrière, 19 July (year not written). Villeroy presses for the Rome mission to leave without delay, warns of Spanish forces and unrest in Paris, and discusses Mayenne and a possible truce.

Decryption: in full above, in George Lasry’s decipherment (readable.md)

Reading: in full above, in George Lasry’s decipherment (readable.md)

Translation: in full above, in George Lasry’s decipherment (translation_excerpt.md)

03 Sources