a Shipp sent to 2 0 ‡ H 6 1 · the ship may stay at 2 ɔ ǂ 6 r y · the Port of 2 0 ǂ 6 ɔ Δ · = VALERY

Westminster → Paris · homophonic letter cipher and name codes in a clear letter · early 1573

Burghley to Walsingham, 29 January 1573: the ship sent to St Valery

William Cecil
fromWilliam Cecil
Francis Walsingham
toFrancis Walsingham

BL Harley MS 260 f. 419r–v (DECODE R8364, catalogue 122), listed as “Unknown sender to …, Feb 1572”. It is a copy in Walsingham’s embassy letter-book of Burghley’s letter of 29 January 1573 answering Walsingham’s of 20 January. The letter is in clear English except for name codes and two short cipher runs. It is part of the plan to bring the Duke of Alençon to England.

The six-sign run is a place name that Digges printed in four letters of the same winter. Comparing the five copies, which use different homophones, with Walsingham’s file gives VALERY, the Channel port of Saint-Valery-sur-Somme. That word is the only cipher text recovered by a key (6 of 26 cipher tokens). The people behind the name codes come from a different source: a Folger chronology of 1573 that summarises this letter (below).

Daniel Bourdeau · posted · updated

Method: key recovered based on plaintext from external sources · Extent: partial (23% of the cipher)

Credits · Adam Wright (pointer to a source)

At a glanceKey from external plaintext · partial (23% of the cipher)

The letter
Burghley to Walsingham, 29 January 1573, copied in a fair-copy letter-book. It concerns the attempt by the Duke of Alençon’s agents to bring him to England on the understanding that Elizabeth might marry him.
Where
British Library, Harley MS 260 f. 419r–v; DECODE R8364, two pages. Printed by Digges (1655, p. 327) with the cipher left as signs.
The cipher
Homophonic letter cipher in two runs, plus boxed and numeral person codes: 26 cipher tokens, among them a six-sign place word and a nine-sign run.
How it was read
The six-sign word is read VALERY, the port of Saint-Valery-sur-Somme: the same word recurs in four letters of the winter, with the same first and third signs, and Walsingham’s file mentions a ship kept waiting there (grade M, probable).
What it says
From a Folger chronology summary: “Davison” is Maisonfleur, “Hall” the Queen, “Glasgow” and the boxed 9 the Duke. These are read from a summary, not a key (grade I).
Still open
The nine-sign run is unread and only H is known. Person codes 3 and II, and the exact values of tt and [9], rest on a summary. No key material is online.
Credit
Adam Wright pointed out the Folger summary on 1 October 2026.

01 The record

Harley MS 260 is a later fair copy of Walsingham’s Paris correspondence of 1570–73, one letter after another with their addresses, under running heads by month. Folio 419r opens with the end of Walsingham’s own letter of 6 February 1572 (old style), in which he asks to be relieved. Then comes the address “To the right honorable Mr Fraunces Walsingham Esq, the Queenes Maiesties Amba[ssador] in Fraunce”, and the letter beginning “Sir I have receaved yor lres of the xxth of this month with the tickett after yor accustomed manner contayning [9]”. The copy breaks off at the foot of f. 419v with a struck-out “finis”. Digges printed it from another copy, with the rest of the letter (Worcester’s dishonour off Boulogne, the French libel against Burghley, Walsingham’s letters of the 24th), under the running head “The Lord Burleigh to Fr. Walsingham”.

DECODE’s sender (“unknown”), recipient (“…”) and date (February 1572) come from the letter-book’s old-style year and the address line. The letter is Burghley’s, to Walsingham, and is dated 29 January 1573 by the Folger chronology (after Conyers Read), which also says he wrote “partly in cipher”.

02 The cipher in the letter

Harley MS 260 f. 419r: of a Shipp sent to 2 0 cross H 6 1 tt ymagined that Hall three had a meaninge to provoake Glascoe [9] to come hither
f. 419r: “for by Davisons writinge of a Shipp sent to 2 0 ‡ H 6 1 tt ymagined that Hall three had a meaninge to provoake Glascoe [9] to come hither”. Image: British Library, Harley MS 260 f. 419r, via DECODE R8364.
PlaceHarley 260Digges 1655What it is
“contayning …”, “sent from …”, “Glascoe …” ×2, “the ruyn of …”[9] ×5|9|, |c|a person code, read as Alençon from the Folger summary (grade I; section 04). Earlier read as a bare marker.
“Glascoe …”, “Hall …” ×23 (“three”)ξ, 3, ȝunread; after Glascoe and Hall the summary has “the Queen” (section 04)
“yf … should soe doe”3ȝunread; here the summary has Alençon
“a Shipp sent to …”2 0 ‡ H 6 120 ǂ H Ꭾ )a place: VALERY
“… ymagined”ttℵa person code, read as Alençon (sense, grade I)
“to enquire …”^ 4 d H m 11 11 I Jx. 7. D. H. m. 11. ⊏. 𝔗. ᘓ.nine signs, unread
“that … had gotten such knowledge”II|—|a person code, unread
Harley MS 260 f. 419v, first two lines: some assurance yf 3 shoulde soe doe to enquire, then nine cipher signs
f. 419v, ll. 1–2: “some assurance yf 3 shoulde soe doe to enquire ^ 4 d H m 11 11 I J. This you must thinke…” Image: British Library, Harley MS 260 f. 419v, via DECODE R8364.

The names in clear are cover-names or real names of the affair of Alençon’s intended crossing, November 1572 to February 1573: Glasgow, Davison, Hall. Who they are is in section 04. Only the two runs are letter cipher.

03 The place name: VALERY

Digges printed the cipher of Walsingham’s correspondence in cipher type; the earlier attempt had taken it for figures. A search of all 457 page images of his volume, first by the OCR’s word confidence and then by two page-by-page scans, found about 45 ciphered passages in the letters of 1570–73. Four of them are the same word, in letters about the one ship:

LetterContextDiggesHarley 260
Burghley, Westminster, 11 Nov 1572 (p. 301)“he hath required me to provide a passenger to attend at Harwich. Le the Port of …”2 0 ǂ 6 ɔ Δ
Walsingham, Paris, Nov 1572 (p. 303)“he desireth that the ship may stay at … 9 or 10 days”2 ɔ ǂ 6 r y
Walsingham, Paris, 20 Jan 1573 (p. 313; R8363)“a Gentleman of [9] departed hence to … with intention to imbarque there”2 ) ⌘ Ꭾ ) 42 1 ⌘ ε 9 4
Burghley, early 1573 (p. 327; R8364)“by Davisons writing of a ship sent to …”20 ǂ H Ꭾ )2 0 ‡ H 6 1

Every copy has six signs. The first is always 2 and the third always the same crossed sign (ǂ, ⌘ and ‡ are the founts’ and the copyist’s versions of it). The other four places change from copy to copy. That is what a homophonic alphabet gives when one word is written several times. The place is a French port where a ship waits for passengers bound for England, with Harwich on the English side. The Nov 1572 letter has Walsingham ask that the ship may stay there nine or ten days. Cotton MS Vespasian F VI, the volume of Walsingham’s letters and drafts of 1572–73, holds at f. 197 “A French letter; earnestly desiring that a ship might be kept in waiting at St. Valery. Dec. 11”. VALERY has six letters, and Digges’s copy of the Walsingham letter even ends in a plain “r y”:

V = 2 · A = 0, ɔ, ), 1 · L = ǂ, ⌘, ‡ · E = 6, Ꭾ, H, ε · R = ɔ, ), r, Ꭾ, 9, 6 · Y = Δ, y, 4, ), 1

A few signs turn up under two letters (ɔ/) under A and R, 1 under A and Y). They are the places where Digges’s type and the letter-book copyist blur distinct manuscript signs, which the Digges and Harley copies of the same letters show. The reading does not depend on them. Dieppe, the other six-letter port, needs a different sign for each of its two Ps and two Es in every copy, and nothing in the sources points to it. Harwich, Dover, Calais and Dieppe are all written in clear elsewhere in these letters.

Grade M (probable). No source gives the alphabet; the length, the fixed signs, the “ry” and the St Valery ship in Walsingham’s file all point to this word. With it the passage runs:

I see there was a great mistaking of our doings, for by Davison’s writing of a ship sent to [St] Valery, [tt] imagined that Hall had a meaning to provoke Glasgow to come hither; whereupon this last gentleman came to enquire of Hall some assurance, if [3] should so do, to enquire […]. This you must think must needs appear very strange.

Read for sense, the sentence is about an invitation. The people in it are identified in the next section. The port is the one in the French letter of 11 December 1572 in Walsingham’s file, and in Walsingham’s letter of 20 January (R8363) a gentleman “departed hence to [St] Valery with intention to imbarque there”.

04 Who is who: the Folger summary

On 1 October 2026 Adam Wright wrote that the Folger Shakespeare Library’s Elizabethan Court Day by Day (the 1573 volume) summarises this letter under 29 January, partly in cipher, and cites Conyers Read, Lord Burghley and Queen Elizabeth (1960), pp. 94–95. The summary names the people where our copy has cover-names and codes. Set side by side, clause by clause, it gives:

Harley 260 f. 419The summary saysSo
“the partie … sent from [9]”the party sent from Alençon[9] = Alençon
“hee spake with Glascoe 3 and Davison with him”he spoke with the Queen, and Maisonfleur with himDavison = Maisonfleur; “Glascoe 3” stands where the summary has the Queen
“tt ymagined”Alençon imaginingtt = Alençon
“Hall 3 had a meaninge to provoake Glascoe [9] to come hither”the Queen had a meaning to provoke him to come hitherHall = the Queen; “Glascoe [9]” = Alençon
“the laste gentleman came to enquier of Hall 3 some assurance yf 3 shoulde soe doe”this last gentleman came to enquire of the Queen for some assurance, if Alençon should do so, that she would marry himthis last gentleman = La Mole; the lone 3 = Alençon
“to enquier ^ 4 d H m 11 11 I J”(the marriage?)the nine signs may carry the marriage; unread

The people are the Duke of Alençon (François, the French king’s youngest brother), his agent Maisonfleur, who had a ship sent to bring him over, and the Sieur de la Mole, who was secretly at Whitehall on 23 January. The same chronology, under 22 January, says a ship sent for the Duke “waited in vain off the French coast for 23 days”. That is the 23 days of Burghley’s letter of 24 January (R8362), and the ship sent to St Valery of this one. The Archbishop of Glasgow is not in it: “Glasgow” is a cover-name, here for the Duke. An earlier version of this page, and of R8362, took it for James Beaton on the strength of the name alone.

What this does and does not give. These identifications are read from a modern summary, not from a key, so they are grade I. We do not know where Read had the plain text of the cipher. Two points do not fit one meaning: the digit 3 follows Glascoe and Hall where the summary has the Queen, but stands alone for the Duke, so it is left unread. And the clear name Glascoe is the Queen in one clause and the Duke in another, according to the digit that follows. The boxed 9 now looks like a code for the Duke rather than a bare marker: “the ticket concerning [9]” (R8363’s of 20 January), “sent from [9]”, “the ruin of [9]” and, in R8363, “a gentleman of [9]” all read well as Alençon. That is an inference from five contexts, not a proof.

05 What was tried for the rest

06 What remains

Of 26 cipher tokens, the six of the place name have a value (23%, grade M). SP 106/2 f. 141A, or a photograph of Cotton Vespasian F VI ff. 172–247, would probably give the rest of this letter and of its siblings R8356, R8358 and R8361, together with the 45 passages in Digges.

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.

Harley MS 260 f. 419r-v, 29 Jan 1573

Walsingham's letter-book copy of Burghley's letter of 29 Jan 1573 to Walsingham, ambassador in France, about Alençon's agents (Maisonfleur as 'Davison', La Mole as 'the laste gentleman') and the ship sent to (St) Valery. The six-sign place name is read as VALERY; the boxed [9] as Alençon from the Folger/Conyers Read summary (via Adam Wright); the nine-sign run and the name codes 3, tt and II stay unread.

Transcription

transcription.txt

# DECODE R8364, BL Harley MS 260 f. 419r-v (letter-book copy). Cipher tokens only, in order, with context.
# [9] = boxed 9 sign (cover-name marker); letter runs space-separated. Digges 1655 p. 327 prints the same letter from
# another copy; its rendering of each item is given after "D:".
f419r l.2  concerning [9]                         D: concerning |9|
f419r l.4  sent from [9]                          D: from |c|
f419r l.5  Glasgow 3                              D: Glasco. ξ.
f419r l.8  ship sent to  2 0 ‡ H 6 1              D: 20 ǂ H Ꮾ )        = VALERY (St Valery), see NOTES
f419r l.8  tt  (before "ymagined")                D: ℵ  (a separate code, subject of "imagining")
f419r l.9  Hall 3 (written "Hall three")          D: Hall 3.
f419r l.10 Glasgow [9]                            D: Glasco |9|
f419r l.11 Hall 3                                 D: Hall ȝ.
f419v l.1  if 3 should so do                      D: if ȝ. should so do
f419v l.2  to enquire  ^ 4 d H m 11 11 I J        D: x. 7. D. H. m. 11. ⊏. 𝔗. ᘓ.
f419v l.7  Glasgow [9]                            D: Glasco |9|
f419v l.7  that II had gotten                     D: that |—| had gotten
f419v l.9  ruin of [9]                            D: ruine of |c|
Transcription

cipher_tokens.txt

# R8364 cipher tokens only, Harley 260 f. 419 copy, in reading order (see transcription.txt for context)
[9]
[9]
3
2 0 ‡ H 6 1
tt
3
[9]
3
3
^ 4 d H m 11 11 I J
[9]
II
[9]
Decryption

reading.txt

# R8364, BL Harley MS 260 f. 419r-v: Burghley to Walsingham, early 1573 (letter-book copy). Clear text transcribed
# from the DECODE images at page level (spelling as far as legible, contractions expanded only where obvious);
# cipher in <> with its reading. {Valery} = the six-sign place name, grade M. <...> = unread.
[f. 419r]
To the right honorable Mr Fraunces Walsingham Esq, the Queenes Maiesties Amba[ssador] in Fraunce
Sir I have receaved your letters of the xxth of this month with the tickett after your accustomed
manner contayning <[9]> and was on Frydaie laste with the partie one whome you made mention to be
sent from <[9] = Alencon, Folger/Read, grade I> hee spake with Glascoe <3> and Davison with him, I see there was a greate mistakinge
of our doinges for by Davisons writinge of a Shipp sent to <2 0 ‡ H 6 1 = {Valery}> <tt = Alencon, Folger/Read, I> ymagined
that Hall <3> had a meaninge to provoake Glascoe <[9]> to come hither whereuppon the
laste gentleman came to enquier of Hall <3>
[f. 419v]
some assurance yf <3 = [Alencon]? lone 3 only, I> shoulde soe doe to enquier <^ 4 d H m 11 11 I J> This you must
thinke muste neede appeare verie strange whereuppon before Davison I did declare
that all that was donne came of him with earnest and lamentable requests to have Glascoe
<[9]> preserved because hee said that <II> had gotten such knowledge as the same would
tende to the ruyn of <[9]> and soe the partie that now was sent is departed well certefied of the
truth, but not satisfied of his request.
It is good to deale warelie herein without knowledge herein for there is some cause to
mistruste that Davison and all his partners doe nothinge herein ordered as there canne
bee noe advantage taken I trust and soe allsoe you maie looke to your doeinges as I see
you are disposed by the occasion of the fond handlinge that you see I am much perplexed
with the dishonor donne to my lord of Worcester her Maiesties Amba[ssador] on the seas before Bullen
whereof by his owne report I knowe you shall knowe the truth more then I yet
doe knowe

# 1 Oct 2026 (Adam Wright): Davison = Maisonfleur; Hall = the Queen; Glascoe [9] = Alencon (cover-name, not the Archbishop of Glasgow); the laste gentleman = La Mole; letter of 29 Jan 1573 (Folger Elizabethan Court Day by Day 1573, after Read 1960 pp. 94-95). Grade I.

07 Sources

Notes, transcription, the list of Digges’s cipher passages and the profile: targets/r8364/.