∝ 6 2 □ L 6. ⅃ 3 9.  = c o n f e r e n s
8. 5 π ⊣ 6 3 10.  = S o i s s o n s
86. π 2 ∝ π 9 ⊔ { 10:  = p r i n c i p a l l y

France → Cecil and the Queen · nomenclator: homophonic alphabet, dotted-letter word codes, name signs and null words · 1563–1566

Sir Thomas Smith’s ciphered despatches from France, 1563–1566

Sir Thomas Smith
fromSir Thomas Smith
William Cecil
toWilliam Cecil

British Library, Add MS 4136 ff. 140, 157–168 (DECODE R9236, R9248, R9249, R9250, R9252, R9253, R9254): Patrick Forbes’s copies of the ciphered stretches of eighteen letters. Smith’s key is on f. 179 of the same volume (DECODE R9261); applied to the copies, it decrypts most passages in full or in large part. The originals were deciphered at the time; Forbes printed the 1563 passages in 1741, and the Calendar of State Papers summarises the rest.

Daniel Bourdeau · posted · updated

Method: read with known key · Extent: complete

Summary. The catalogue listed six DECODE records of Sir Thomas Smith, ambassador in France from 1562, as not decrypted. They are leaves from the working file of Patrick Forbes, who in the 1730s copied only the ciphered stretches of each despatch, numbered them, and printed the decipherments in A Full View of the Public Transactions in the Reign of Q. Elizabeth (1740–41). The six records hold eighteen letters, from 17 January 1563 to 29 April 1566. Smith’s own key, “Sr Thomas Smith’s Cipher”, is filed in the same volume as DECODE R9261; Tomokiyo had pointed to it in 2024. It was applied to the passages, transcribed from the images. The five letters of January–April 1563 agree word for word with Forbes’s printed text. The thirteen later letters were deciphered at the time on the originals in The National Archives, but the Calendar of State Papers, Foreign gives only summaries; here they are decrypted in Smith’s words, most of them in full or in large part, and none contradicts the calendar. Two headings are misdated (Avignon 4 October 1564, not 27 October; 22 March 1566, not 1567), and one word the key lists among the nulls, enos, means “ambassador”. Some dotted-letter word signs are still interpreted from context.
Forbes's copy of Smith's letter from Arles, 24 November 1564: the heading and the first lines of cipher
Add MS 4136 f. 166 (DECODE R9253): Forbes’s heading “Sr Tho: Smith to Sec: Cecill, from Arles. 24 Nov: 1564” and the first lines of the cipher: [the Cardinal of Lorraine] and the [Prince of Condé] have had conferens and familiar banketting togither at Soissons. Image: British Library, Add MS 4136 f. 166, via DECODE R9253.

01 The records and the key

Add MS 4136 is Forbes’s deciphering file for his Full View. For each despatch he copied only what was in cipher, numbered the stretches (1), (2), … in the order they come in the letter, and headed the group with writer, recipient and date. The clear English place names scattered through the copies (London, Dover, Hastings, Lyn, Boston, Poole, Dunkirk…) and the words and, bycause, don, yf are Smith’s nulls: the key lists them under “Nothings”.

Sir Thomas Smith's Cipher, Add MS 4136 f. 179
Add MS 4136 f. 179 (DECODE R9261 p. 1), “Sr Thomas Smith’s Cipher”: the alphabet on the left, the word list in the middle, the name signs, and the “Nothings” on the right. Image: British Library, Add MS 4136 f. 179, via DECODE R9261.

The alphabet gives each letter from a to m one to four invented signs, and n, o and p the figures 2–4, 5–7 and 8–10. The same figures with a dot are r and s, and with a colon t, u/v and y, so 6 is o, 6. r and 6: u. Common words are Latin letters marked with dots, colons or bars on different sides (·A and, A: all, :a at, b: be, :b by, F: from, :W which, Ẅ with), and da and ba are the endings -ing and -ed. About thirty signs stand for names: the Admiral, the Constable, the Duke of Guise, the Queen Mother, the Prince of Condé, the Cardinal of Lorraine, the Queen’s Majesty, England, Scotland, France, Spain, the Pope.

RecordFolioLetterRead herePrinted or calendared
R9248157to the Queen, Chartres, 17 Jan 1562/3tested on two passagesForbes ii 287–9; CSP F. vi 109
R9249158to Cecil, 27 Jan 1562/3all 32 passagesForbes ii 315–18
R9252163–4to Cecil, Blois, 7 Mar 1562/3about halfForbes ii 350–51
R9254167–8to the Queen, Blois, 12 Mar 1562/3not transcribedForbes ii c. 354–59
R9250159to Cecil, 13 Apr 1563all 12Forbes ii 384–86
R9250159to the Queen, 27 July 1563in partCSP F. vi 1078
R9250159to Cecil, 25 Jan 1563/4large partCSP F. vii 103
R9252164to Cecil, Valence, 1 Sep 156428 of 31CSP F. vii 642
R9252164to Cecil, Valence, 3 Sep 1564bothCSP F. vii 650
R9252164–5to Cecil, Avignon, 4 Oct 1564about 50 of 62CSP F. vii 714
R9253166to Cecil, Marseilles, 13 Nov 1564in partCSP F. vii 793
R9253166to Cecil, Arles, 20 Nov 1564large partCSP F. vii 806
R9253166to Cecil, Arles, 22 Nov 1564in part (two signs)CSP F. vii 808
R9253166to Cecil, Arles, 24 Nov 1564all but a few signsCSP F. vii 815
R9254167to Cecil, Narbonne, 7 Jan 1564/5large partCSP F. vii 916
R9254167to Cecil, Toulouse, 9 Feb 1564/5all 10CSP F. vii 979
R9250159–60to Cecil, Bourbon-l’Archambault, 22 Mar 1565/6about 12 of 27CSP F. viii 208
R9250160to Cecil, 29 Apr 1566all 5CSP F. viii 327

02 1563: the passages Forbes printed

The first test passage, in the letter to the Queen of 17 January 1563, came out as chief … on the other side, and Forbes (ii 287) prints: “I do take yt marvelous necessary, that some man were sent to be with the admirall who now is chief on the other side.” In the letter to Cecil of 27 January all 32 stretches run with Forbes’s text in order: the rendering of Tankervill; that is to have one on the other side with the admiral, and I have named him who, for th’acquaintance with the admiral and all of that faction, the knowledge of the countrey and all other respectes, is most fit. But you must dispach him streight; you must not stic for honest allowance in tyme of service; Monsieur Danville is to come over into England shortly; such noblemen of Scotland as favoreth the religion and wold contynew the amytie between Scotland and us. The letter of 13 April is decrypted in full, the Blois letter of 7 March about half.

03 1563–1566: the passages the calendar only summarises

Arles, 24 November 1564 (“chiefly in cipher, deciphered”, CSP no. 815): “[The Cardinal of Lorraine] and the [Prince of Condé] have had conferens and familiar banketting togither at Soissons and at Nanteuil chasteau, which was the late [Cardinal] of Burbons’ … They of Guyse … complaine that all letters that come from the Cardinal … be opened, principally at Paris and Lyons … Madame de Guise … daily in great dispatches to and from Scotland … This bearer Hume is altogether a Lidington, whom you shall find double, I am afraid, or rather triple, having … pencions of all three princes.”

Avignon, 4 October 1564 (CSP no. 714; Forbes’s heading had been taken as 27 October): the two designs of the French court, one of them of the papists, to bring “all again to the olde state” and “break the amity” of England and Scotland; “the Bishop of Glasgow is here greater, no embassador”; “the marriage of the Queen of Scots”, the Earl of Warwick, Lord Robert and the Prince of Spain, “two marriages for her”; “the house of Guise stronger, which is too stronge”; the Earl of Lennox’s practice “to marry his sonne”, and “they feare that she is enclined to this last offer of Lenox”.

Valence, 1 September 1564 (CSP no. 642): the amity between England and Scotland, the Earl of Murray, “such lords and great men … be the great favourers of religion … to do some great enterprise”, Huntly “died and his sonnes were taken”, Lethington, the Bishop of Glasgow’s pension, and “to marry Lord Robert”. On 3 September the two ciphered words are names: Nanion Cocborne and Villeroy.

25 January 1564 (CSP no. 103): the Spanish ambassador reports the French making ladders at Étaples and Boulogne, to surprise a town in England or fall on the Low Countries; the King of Spain has made no league with the Pope and means nothing against the Queen of Navarre, but wants “to make himself rich”.

The other letters are shorter. Arles, 20 November, on the bearer Adam Hume, runs almost word for word with the calendar up to “glad to be rid of him”. Narbonne, 7 January 1565, covers the posts out of Scotland, Beton and Hume going by land, and “the marriage between the Duke of Guise and the Queen of Scots”. From Bourbon-l’Archambault, 22 March 1566, come the ambassadors of Spain and Scotland with the Cardinal of Lorraine, the Bishop of Glasgow looking to be a cardinal, and a Scottish woman who is “the conveyor of [letters] out of Scotland to the [Lady] Lennox”. And 29 April 1566 names “Peter Clare … Almain captain … Albert de Rosemberg”, and the “continuation with the princes of Almain for the recovery of Metz and Calais”.

04 Folio 140: five earlier letters (DECODE R9236)

A seventh record, R9236 (Add MS 4136 f. 140, catalogue 94), is another of Forbes’s leaves: the ciphered passages of Smith to Cecil of 15 October, 20 October and 15/17 December 1562, to the Queen of 4 November 1563, and of “Sir Thomas Smith’s advertisements from France, 31 Jan. 1562[/3]”. The clear words scattered through them (London, Lyn, Poole, Boston, Dover, Hastings, Garnesey) are the nulls of the same key, R9261; DECODE names R9262 as the nearest key, which is Throckmorton’s. Decryptions, added 21 September 2026:

One variant appears on this leaf only: a double bar stands for i. Passage-by-passage decryptions are in smith1562/decipher_E.md.

05 Method

The six records and the Smith-series key records were fetched from DECODE. The first key record DECODE names, R9262, is Throckmorton’s third cipher. The record listing around it gave R9261, whose first page is Smith’s cipher and whose second is Sir James Croft’s. The passages were transcribed from the images and the key applied sign by sign. Forbes’s printed letters (vol. ii, from the archive.org text) and the calendar summaries were used only to confirm decryptions; where they did not fit the signs the passage was left open. Values added to the key:

06 What remains uncertain

07 Sources

Notes, the key summary, the passage-by-passage decryptions and the profile are in the repository folder smith1562/. The sibling pages Throckmorton and Percy 1559 use the same volume.