29 38 19 69 [E] 37 [C] 24 23 35 [M] 28 [N]der Beretti Landi euch Namen29 = D · 38 = E · 19 = R · 69 = Beretti Landi · zi = Hof · ab = Anjou

Vienna → The Hague, Cambrai · the Emperor’s private key R5018, numbers and signs · 1720–1722 · known key applied

Charles VI to Count Windischgrätz in the private key, 1720–1722

Charles VI
fromCharles VI

Three letters of the Emperor to his envoy in the private key he sent him in 1720, deciphered with that key, which survives in the family archive: a Spanish marriage for his children, proposed in 1720 and again in 1722.

Daniel Bourdeau · posted · updated

Method: read with known key · Extent: complete

Credits · Mírka (pointer to a source) · Contemporary key or decipherment (key or decipherment used)

At a glanceKnown key applied · complete

The letters
Charles VI to Count Leopold Viktorin Windischgrätz: Vienna, 13 April 1720 and 24 July 1720 (to The Hague), and 11 April 1722 (to Cambrai). Nos. 2, 3 and 6 of the family’s register.
Where
Státní oblastní archiv v Plzni, Rodinný archiv Windischgrätzů: autograph inv. 694 karton 5 (R5021), register copies inv. 5 book 5 pp. 404–416 (R5022, R5023, R5024). Catalogue item 69.
The cipher
The private key R5018: each letter has a number from 10 to 38 and a graphic sign, the vowels a second number; about 300 codes for words and names.
How it was deciphered
The key, on DECODE and in the same archive, was transcribed and applied by hand, matching the copyist’s signs to the key’s drawings.
What it says
Orléans and Spain, the burden of the Barrier; Beretti Landi’s proposal of a marriage between the Emperor’s children and Philip V’s sons, “beede so klein”.
Still open
The cleartext around the cipher is summarised, not edited; Nos. 4, 5 and 7 of the register are not on DECODE.

The first letter of the series, of 3 February 1720, is in the Court Chancellery’s nomenclator R5017 and announces this key; it is a different cipher with its own page: Charles VI to Windischgrätz, 3 February 1720.

01 The private key

R5018 is the new private key, on a single sheet. Each of 24 letters has a number from 10 to 38 and a graphic sign, and the vowels have a second number. About 300 codes follow, as numbers 39–210 or two-letter groups (ab Anjou, fb Spanien, zi Hof, 69 Beretti Landi, 151 Oesterreich, 159 Orleans), and the nulls are 3 4 5 6 7 9. Several names were added later in paler ink, among them Fleury, Walpole and Windischgrätz himself. The docket on the back reads “Ziffern mit J[hr]: K[ayserlichen] M[ajestät] …”. Mírka noted in 2012 that the later letters are in this key.

The alphabet grid at the top of key R5018: letters A to Z, each with a number and a graphic sign
Key R5018, the top of the sheet: each letter with its number, its sign and, for the vowels, a second number. The nomenclature columns begin below. Image: Státní oblastní archiv v Plzni, Rodinný archiv Windischgrätzů, key sheet, via DECODE R5018.

02 The three letters

In R5018 the letters are spelt out one symbol at a time, mixing the number and the sign for the same letter freely, and names are given as codes. Decrypted from the register copy:

Register copy, page 408: cipher in numbers and graphic signs
Register copy, book 5 p. 408 (No. 3): “Was nemblich der Beretti Landi euch Namen seines Hofs über ein Proposition gethan eine Heyrath zwischen ein oder andern meiner Kinder und Anjou Söhne”. Image: Státní oblastní archiv v Plzni, Rodinný archiv Windischgrätzů inv. 5, book 5 p. 408, via DECODE R5023.

The marriage theme runs from 1720 to 1722, well before the Ripperda negotiations of 1725 that promised the Emperor’s daughters to Philip V’s sons.

03 Method and what remains

The key sheet was transcribed from tiled crops of the DECODE image, with a confidence mark on each cell. The letters were decoded by hand from the register copies (and the autograph of No. 2), because the copyist’s signs have to be matched to the key’s drawings. The copyist uses one sign for D and N, and one sign for Z and G; the numbered letters around each sign decide which is meant.

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.

No. 2, Vienna, 13 Apr 1720 (R5021 autograph, R5022 copy)

Charles VI to Windischgrätz: whether [Spain] and Orleans will in the end come to terms with one another again, and how one could free oneself entirely from the burden of the Barrier.

Transcription

dec_R5018_letters.md

# Letters in the second key (R5018): decryptions

Key R5018 (see key5018.md): each letter has a number from 10 to 38 and a graphic sign; the vowels have a second
number. Codes 39–210 and two-letter groups stand for words; 3–7 and 9 are nulls. Words are written
continuously, one symbol per letter. Numbers are from the register copy (SOA Plzeň, RA Windischgrätz, inv. 5,
book 5). Signs are given as the letter they stand for, in brackets, e.g. [E] for the reversed-C sign.
The copyist's sign forms drift: the q-with-crossbars sign serves D and, once, N (in "convenienz"), so the
reading of each sign is settled by the letter-number around it. Every passage below reads as German that fits its clear context.

## No. 2, Vienna, 13 April 1720 (R5021 autograph, R5022 copy, book pp. 404–407)

1. p. 405: "…gut zu machen. Das ob **[V] 23 29 159** sich endlich wider **[M] 36 14 38 [I] 23 35 [N] 29 [E] 19 15 28 [R] 16 14 [E] 23** werden, ist schir zu besorgen…"
   - V N D + 159 → **und Orleans**
   - M I T E I N A N D E R V E R S T E N → **mit einander versten[den]**
   - Reading: *ob … und Orleans sich endlich wider miteinander verstehen werden* (whether … and the Duke of
     Orleans will in the end come to terms with one another again). The subject is presumably Spain, named in the
     clear text just before, which is not transcribed here.
2. p. 405: "…project, hätte wie man sich völlig **37 34 23 [D] [E] [M] 20 23 [E] 19 38 29 28 [R] 54** befreyen könnte…"
   - V O N D E M O N E R E D E R + 54 → **von dem onere der Barriere**
   - Reading: *how one could entirely free oneself from the burden of the Barrier* (the Dutch Barrier fortresses in
     the Austrian Netherlands, whose upkeep the Emperor paid).

## No. 3, Vienna, 24 July 1720 (R5023 copy, book pp. 407–409; autograph not found)

All the cipher is on p. 408.

1. "Was nemblich **29 38 19 69 [E] 37 [C] 24 23 35 [M] 28 [N]** seines **zi** über **[E] 36 23 18 19 [P] 34 16 36 [Z?] [I] 20 23** gethan eine **24 28 11 [R] 35 14 [H] [Z] 10 22 [S] 31 24 [E] 23** ein oder andern **38 [R] [M] 38 22 23 [E] [R] [K] 36 23 [D] 28 19** und **ab [S] 34 24 [N] [E]** belangt…"
   - D E R + 69 = **der Beretti Landi**; E U C H N A M E N = **euch Namen**; zi = **Hof(s)**
   - E I N P R P O S I ? I O N = **ein Proposition** (the copyist wrote P for O and Z for T)
   - H E Y R A T H Z W I S C H E N = **Heyrath zwischen**
   - E R M E I N E R K I N D E R = **[ander]er meiner Kinder**
   - ab S O H N E = **Anjou Söhne** (ab = Anjou, i.e. Philip V of Spain)
   - Reading: *As for what Beretti Landi put to you in the name of his court: a proposal of a marriage between
     one or other of my children and Anjou's sons…*
2. "…die antwort erhalten, das **36 [C] 24** (absonderlich da sich die conjunctur so weit nun geben haben)
   allzeit nun gehen in **[G] 15 14 28 19 37 [E] [R] [S] 14 38 23 29 23 15 16** mit **16 28 22 [N] [E] 23 zi** stehen würde…"
   - I C H = **ich**; G V T E R V E R S T E N D N V S = **guter Verstendnus**; S E I N E N zi = **seinen Hof**
   - Reading: *that I, especially now that the situation has turned this way, would always be ready to stand on good
     terms with his court.*
3. "Was aber **29 22 [E] [H] 38 28 [Y?] 19 35 14 24** betrifft, wer **28 23 32 [E] [D] 28 [S] 34 [K] 21 [E] 22 23**, das wohl noch davon nichts kund gemacht werden…"
   - D I E H E Y R A T H = **die Heyrath** (the copyist wrote an extra E); E N B E D E S O K L E I N = **[wer]en beede so klein**
   - Reading: *As for the marriage: they are both so small that nothing should be made known of it yet.*

## No. 6, Vienna, 11 April 1722, to Windischgrätz as plenipotentiary at the Congress of Cambrai
(R5024 copy, book pp. 414–416)

1. p. 415: "…was ihr **10 38 27 [E] [N] 29 28 16 69** schreibt, absonderlich was ihr auch **[M] 22 [T] 69 10 28 [G] 38 23** eine**19 24 [E] 11 [R] 35 14 24** gerissen, **fb 37 [N] 29 25 36 [R]** unterredt habt…"
   - W E G E N D E S + 69 = **wegen des Beretti**; M I T + 69 + W E G E N = **mit Beretti wegen**
   - R H E Y R A T H = **[eine]r Heyrath**; fb V N D M I R = **Spanien und mir**
   - Reading: *what you write about Beretti, above all what you discussed with Beretti about a marriage between Spain and me…*
2. p. 416: "…aber sich des **69 [G] 37 32 [R] 35 [V] [C] 24 [E] 23** findt eins theil nit übel…"
   - + 69, G V B R A V C H E N = **Beretti gebrauchen**: *but to make use of Beretti is in some ways not bad…*
3. p. 416: "…erbittert **V[?] [N] 29 28 19 25 36 31 [H]** und **151**…"
   - V N D E R M I C H + 151 = **under (wider) mich und Oesterreich**: *embittered against me and Austria*
4. p. 416: "…kan man suchen **22 24 [M]** all **[C] 20 [N] 15 38 23 36 [E] 23 13** inutili et honorifico zu machen…"
   - I H M + all + C O N V E N I E N Z = **ihm all convenienz** *in utili et honorifico*: *to show him every
     consideration in profit and honour.*
Decryption

dec_R5018_letters.md

# Letters in the second key (R5018): decryptions

Key R5018 (see key5018.md): each letter has a number from 10 to 38 and a graphic sign; the vowels have a second
number. Codes 39–210 and two-letter groups stand for words; 3–7 and 9 are nulls. Words are written
continuously, one symbol per letter. Numbers are from the register copy (SOA Plzeň, RA Windischgrätz, inv. 5,
book 5). Signs are given as the letter they stand for, in brackets, e.g. [E] for the reversed-C sign.
The copyist's sign forms drift: the q-with-crossbars sign serves D and, once, N (in "convenienz"), so the
reading of each sign is settled by the letter-number around it. Every passage below reads as German that fits its clear context.

## No. 2, Vienna, 13 April 1720 (R5021 autograph, R5022 copy, book pp. 404–407)

1. p. 405: "…gut zu machen. Das ob **[V] 23 29 159** sich endlich wider **[M] 36 14 38 [I] 23 35 [N] 29 [E] 19 15 28 [R] 16 14 [E] 23** werden, ist schir zu besorgen…"
   - V N D + 159 → **und Orleans**
   - M I T E I N A N D E R V E R S T E N → **mit einander versten[den]**
   - Reading: *ob … und Orleans sich endlich wider miteinander verstehen werden* (whether … and the Duke of
     Orleans will in the end come to terms with one another again). The subject is presumably Spain, named in the
     clear text just before, which is not transcribed here.
2. p. 405: "…project, hätte wie man sich völlig **37 34 23 [D] [E] [M] 20 23 [E] 19 38 29 28 [R] 54** befreyen könnte…"
   - V O N D E M O N E R E D E R + 54 → **von dem onere der Barriere**
   - Reading: *how one could entirely free oneself from the burden of the Barrier* (the Dutch Barrier fortresses in
     the Austrian Netherlands, whose upkeep the Emperor paid).

## No. 3, Vienna, 24 July 1720 (R5023 copy, book pp. 407–409; autograph not found)

All the cipher is on p. 408.

1. "Was nemblich **29 38 19 69 [E] 37 [C] 24 23 35 [M] 28 [N]** seines **zi** über **[E] 36 23 18 19 [P] 34 16 36 [Z?] [I] 20 23** gethan eine **24 28 11 [R] 35 14 [H] [Z] 10 22 [S] 31 24 [E] 23** ein oder andern **38 [R] [M] 38 22 23 [E] [R] [K] 36 23 [D] 28 19** und **ab [S] 34 24 [N] [E]** belangt…"
   - D E R + 69 = **der Beretti Landi**; E U C H N A M E N = **euch Namen**; zi = **Hof(s)**
   - E I N P R P O S I ? I O N = **ein Proposition** (the copyist wrote P for O and Z for T)
   - H E Y R A T H Z W I S C H E N = **Heyrath zwischen**
   - E R M E I N E R K I N D E R = **[ander]er meiner Kinder**
   - ab S O H N E = **Anjou Söhne** (ab = Anjou, i.e. Philip V of Spain)
   - Reading: *As for what Beretti Landi put to you in the name of his court: a proposal of a marriage between
     one or other of my children and Anjou's sons…*
2. "…die antwort erhalten, das **36 [C] 24** (absonderlich da sich die conjunctur so weit nun geben haben)
   allzeit nun gehen in **[G] 15 14 28 19 37 [E] [R] [S] 14 38 23 29 23 15 16** mit **16 28 22 [N] [E] 23 zi** stehen würde…"
   - I C H = **ich**; G V T E R V E R S T E N D N V S = **guter Verstendnus**; S E I N E N zi = **seinen Hof**
   - Reading: *that I, especially now that the situation has turned this way, would always be ready to stand on good
     terms with his court.*
3. "Was aber **29 22 [E] [H] 38 28 [Y?] 19 35 14 24** betrifft, wer **28 23 32 [E] [D] 28 [S] 34 [K] 21 [E] 22 23**, das wohl noch davon nichts kund gemacht werden…"
   - D I E H E Y R A T H = **die Heyrath** (the copyist wrote an extra E); E N B E D E S O K L E I N = **[wer]en beede so klein**
   - Reading: *As for the marriage: they are both so small that nothing should be made known of it yet.*

## No. 6, Vienna, 11 April 1722, to Windischgrätz as plenipotentiary at the Congress of Cambrai
(R5024 copy, book pp. 414–416)

1. p. 415: "…was ihr **10 38 27 [E] [N] 29 28 16 69** schreibt, absonderlich was ihr auch **[M] 22 [T] 69 10 28 [G] 38 23** eine**19 24 [E] 11 [R] 35 14 24** gerissen, **fb 37 [N] 29 25 36 [R]** unterredt habt…"
   - W E G E N D E S + 69 = **wegen des Beretti**; M I T + 69 + W E G E N = **mit Beretti wegen**
   - R H E Y R A T H = **[eine]r Heyrath**; fb V N D M I R = **Spanien und mir**
   - Reading: *what you write about Beretti, above all what you discussed with Beretti about a marriage between Spain and me…*
2. p. 416: "…aber sich des **69 [G] 37 32 [R] 35 [V] [C] 24 [E] 23** findt eins theil nit übel…"
   - + 69, G V B R A V C H E N = **Beretti gebrauchen**: *but to make use of Beretti is in some ways not bad…*
3. p. 416: "…erbittert **V[?] [N] 29 28 19 25 36 31 [H]** und **151**…"
   - V N D E R M I C H + 151 = **under (wider) mich und Oesterreich**: *embittered against me and Austria*
4. p. 416: "…kan man suchen **22 24 [M]** all **[C] 20 [N] 15 38 23 36 [E] 23 13** inutili et honorifico zu machen…"
   - I H M + all + C O N V E N I E N Z = **ihm all convenienz** *in utili et honorifico*: *to show him every
     consideration in profit and honour.*
Reading

No2_reading.md

<!-- Reading of No. 2 (Claude Opus 5.5, 23 Oct 2026): the cipher passages of No. 2 in dec_R5018_letters.md (key R5018; register copy, SOA Plzeň inv. 5 book 5), each in the clear words quoted around it there, the cipher in ⟦ ⟧ written as the decoded letters give it (copyist slips noted there; [x] = letters supplied there). An excerpt, one passage per paragraph: the clear letter is quoted only around the passages; the rest is not transcribed in the repository. -->

# No. 2, Charles VI to Count Windischgrätz, Vienna, 13 April 1720: reading of the cipher passages

## Reading

Das ob ⟦und Orleans⟧ sich endlich wider ⟦mit einander versten[den]⟧ werden, ist schir zu besorgen

project, hätte wie man sich völlig ⟦von dem onere der Barriere⟧ befreyen könnte
Translation

No2_en.md

<!-- English translation of No2_reading.md (Claude Opus 5.5, 23 Oct 2026): the cipher passages (in ⟦ ⟧) of No. 2 in their quoted clear context. An excerpt. -->

# No. 2, Charles VI to Count Windischgrätz, Vienna, 13 April 1720: English translation of the cipher passages

That whether ⟦… and Orléans⟧ will in the end ⟦come to terms with one another⟧ again is almost to be feared

project, would have how one could free oneself entirely ⟦from the burden of the Barrier⟧

No. 3, Vienna, 24 Jul 1720 (R5023 copy)

Beretti Landi, the Spanish envoy at The Hague, proposed in his court's name a marriage between one of the Emperor's children and Anjou's sons; Charles will stay on good terms with that court, but 'both are so small' that nothing is to be made known yet, an early trace of the Austro-Spanish marriage scheme of 1725.

Transcription

dec_R5018_letters.md

# Letters in the second key (R5018): decryptions

Key R5018 (see key5018.md): each letter has a number from 10 to 38 and a graphic sign; the vowels have a second
number. Codes 39–210 and two-letter groups stand for words; 3–7 and 9 are nulls. Words are written
continuously, one symbol per letter. Numbers are from the register copy (SOA Plzeň, RA Windischgrätz, inv. 5,
book 5). Signs are given as the letter they stand for, in brackets, e.g. [E] for the reversed-C sign.
The copyist's sign forms drift: the q-with-crossbars sign serves D and, once, N (in "convenienz"), so the
reading of each sign is settled by the letter-number around it. Every passage below reads as German that fits its clear context.

## No. 2, Vienna, 13 April 1720 (R5021 autograph, R5022 copy, book pp. 404–407)

1. p. 405: "…gut zu machen. Das ob **[V] 23 29 159** sich endlich wider **[M] 36 14 38 [I] 23 35 [N] 29 [E] 19 15 28 [R] 16 14 [E] 23** werden, ist schir zu besorgen…"
   - V N D + 159 → **und Orleans**
   - M I T E I N A N D E R V E R S T E N → **mit einander versten[den]**
   - Reading: *ob … und Orleans sich endlich wider miteinander verstehen werden* (whether … and the Duke of
     Orleans will in the end come to terms with one another again). The subject is presumably Spain, named in the
     clear text just before, which is not transcribed here.
2. p. 405: "…project, hätte wie man sich völlig **37 34 23 [D] [E] [M] 20 23 [E] 19 38 29 28 [R] 54** befreyen könnte…"
   - V O N D E M O N E R E D E R + 54 → **von dem onere der Barriere**
   - Reading: *how one could entirely free oneself from the burden of the Barrier* (the Dutch Barrier fortresses in
     the Austrian Netherlands, whose upkeep the Emperor paid).

## No. 3, Vienna, 24 July 1720 (R5023 copy, book pp. 407–409; autograph not found)

All the cipher is on p. 408.

1. "Was nemblich **29 38 19 69 [E] 37 [C] 24 23 35 [M] 28 [N]** seines **zi** über **[E] 36 23 18 19 [P] 34 16 36 [Z?] [I] 20 23** gethan eine **24 28 11 [R] 35 14 [H] [Z] 10 22 [S] 31 24 [E] 23** ein oder andern **38 [R] [M] 38 22 23 [E] [R] [K] 36 23 [D] 28 19** und **ab [S] 34 24 [N] [E]** belangt…"
   - D E R + 69 = **der Beretti Landi**; E U C H N A M E N = **euch Namen**; zi = **Hof(s)**
   - E I N P R P O S I ? I O N = **ein Proposition** (the copyist wrote P for O and Z for T)
   - H E Y R A T H Z W I S C H E N = **Heyrath zwischen**
   - E R M E I N E R K I N D E R = **[ander]er meiner Kinder**
   - ab S O H N E = **Anjou Söhne** (ab = Anjou, i.e. Philip V of Spain)
   - Reading: *As for what Beretti Landi put to you in the name of his court: a proposal of a marriage between
     one or other of my children and Anjou's sons…*
2. "…die antwort erhalten, das **36 [C] 24** (absonderlich da sich die conjunctur so weit nun geben haben)
   allzeit nun gehen in **[G] 15 14 28 19 37 [E] [R] [S] 14 38 23 29 23 15 16** mit **16 28 22 [N] [E] 23 zi** stehen würde…"
   - I C H = **ich**; G V T E R V E R S T E N D N V S = **guter Verstendnus**; S E I N E N zi = **seinen Hof**
   - Reading: *that I, especially now that the situation has turned this way, would always be ready to stand on good
     terms with his court.*
3. "Was aber **29 22 [E] [H] 38 28 [Y?] 19 35 14 24** betrifft, wer **28 23 32 [E] [D] 28 [S] 34 [K] 21 [E] 22 23**, das wohl noch davon nichts kund gemacht werden…"
   - D I E H E Y R A T H = **die Heyrath** (the copyist wrote an extra E); E N B E D E S O K L E I N = **[wer]en beede so klein**
   - Reading: *As for the marriage: they are both so small that nothing should be made known of it yet.*

## No. 6, Vienna, 11 April 1722, to Windischgrätz as plenipotentiary at the Congress of Cambrai
(R5024 copy, book pp. 414–416)

1. p. 415: "…was ihr **10 38 27 [E] [N] 29 28 16 69** schreibt, absonderlich was ihr auch **[M] 22 [T] 69 10 28 [G] 38 23** eine**19 24 [E] 11 [R] 35 14 24** gerissen, **fb 37 [N] 29 25 36 [R]** unterredt habt…"
   - W E G E N D E S + 69 = **wegen des Beretti**; M I T + 69 + W E G E N = **mit Beretti wegen**
   - R H E Y R A T H = **[eine]r Heyrath**; fb V N D M I R = **Spanien und mir**
   - Reading: *what you write about Beretti, above all what you discussed with Beretti about a marriage between Spain and me…*
2. p. 416: "…aber sich des **69 [G] 37 32 [R] 35 [V] [C] 24 [E] 23** findt eins theil nit übel…"
   - + 69, G V B R A V C H E N = **Beretti gebrauchen**: *but to make use of Beretti is in some ways not bad…*
3. p. 416: "…erbittert **V[?] [N] 29 28 19 25 36 31 [H]** und **151**…"
   - V N D E R M I C H + 151 = **under (wider) mich und Oesterreich**: *embittered against me and Austria*
4. p. 416: "…kan man suchen **22 24 [M]** all **[C] 20 [N] 15 38 23 36 [E] 23 13** inutili et honorifico zu machen…"
   - I H M + all + C O N V E N I E N Z = **ihm all convenienz** *in utili et honorifico*: *to show him every
     consideration in profit and honour.*
Decryption

dec_R5018_letters.md

# Letters in the second key (R5018): decryptions

Key R5018 (see key5018.md): each letter has a number from 10 to 38 and a graphic sign; the vowels have a second
number. Codes 39–210 and two-letter groups stand for words; 3–7 and 9 are nulls. Words are written
continuously, one symbol per letter. Numbers are from the register copy (SOA Plzeň, RA Windischgrätz, inv. 5,
book 5). Signs are given as the letter they stand for, in brackets, e.g. [E] for the reversed-C sign.
The copyist's sign forms drift: the q-with-crossbars sign serves D and, once, N (in "convenienz"), so the
reading of each sign is settled by the letter-number around it. Every passage below reads as German that fits its clear context.

## No. 2, Vienna, 13 April 1720 (R5021 autograph, R5022 copy, book pp. 404–407)

1. p. 405: "…gut zu machen. Das ob **[V] 23 29 159** sich endlich wider **[M] 36 14 38 [I] 23 35 [N] 29 [E] 19 15 28 [R] 16 14 [E] 23** werden, ist schir zu besorgen…"
   - V N D + 159 → **und Orleans**
   - M I T E I N A N D E R V E R S T E N → **mit einander versten[den]**
   - Reading: *ob … und Orleans sich endlich wider miteinander verstehen werden* (whether … and the Duke of
     Orleans will in the end come to terms with one another again). The subject is presumably Spain, named in the
     clear text just before, which is not transcribed here.
2. p. 405: "…project, hätte wie man sich völlig **37 34 23 [D] [E] [M] 20 23 [E] 19 38 29 28 [R] 54** befreyen könnte…"
   - V O N D E M O N E R E D E R + 54 → **von dem onere der Barriere**
   - Reading: *how one could entirely free oneself from the burden of the Barrier* (the Dutch Barrier fortresses in
     the Austrian Netherlands, whose upkeep the Emperor paid).

## No. 3, Vienna, 24 July 1720 (R5023 copy, book pp. 407–409; autograph not found)

All the cipher is on p. 408.

1. "Was nemblich **29 38 19 69 [E] 37 [C] 24 23 35 [M] 28 [N]** seines **zi** über **[E] 36 23 18 19 [P] 34 16 36 [Z?] [I] 20 23** gethan eine **24 28 11 [R] 35 14 [H] [Z] 10 22 [S] 31 24 [E] 23** ein oder andern **38 [R] [M] 38 22 23 [E] [R] [K] 36 23 [D] 28 19** und **ab [S] 34 24 [N] [E]** belangt…"
   - D E R + 69 = **der Beretti Landi**; E U C H N A M E N = **euch Namen**; zi = **Hof(s)**
   - E I N P R P O S I ? I O N = **ein Proposition** (the copyist wrote P for O and Z for T)
   - H E Y R A T H Z W I S C H E N = **Heyrath zwischen**
   - E R M E I N E R K I N D E R = **[ander]er meiner Kinder**
   - ab S O H N E = **Anjou Söhne** (ab = Anjou, i.e. Philip V of Spain)
   - Reading: *As for what Beretti Landi put to you in the name of his court: a proposal of a marriage between
     one or other of my children and Anjou's sons…*
2. "…die antwort erhalten, das **36 [C] 24** (absonderlich da sich die conjunctur so weit nun geben haben)
   allzeit nun gehen in **[G] 15 14 28 19 37 [E] [R] [S] 14 38 23 29 23 15 16** mit **16 28 22 [N] [E] 23 zi** stehen würde…"
   - I C H = **ich**; G V T E R V E R S T E N D N V S = **guter Verstendnus**; S E I N E N zi = **seinen Hof**
   - Reading: *that I, especially now that the situation has turned this way, would always be ready to stand on good
     terms with his court.*
3. "Was aber **29 22 [E] [H] 38 28 [Y?] 19 35 14 24** betrifft, wer **28 23 32 [E] [D] 28 [S] 34 [K] 21 [E] 22 23**, das wohl noch davon nichts kund gemacht werden…"
   - D I E H E Y R A T H = **die Heyrath** (the copyist wrote an extra E); E N B E D E S O K L E I N = **[wer]en beede so klein**
   - Reading: *As for the marriage: they are both so small that nothing should be made known of it yet.*

## No. 6, Vienna, 11 April 1722, to Windischgrätz as plenipotentiary at the Congress of Cambrai
(R5024 copy, book pp. 414–416)

1. p. 415: "…was ihr **10 38 27 [E] [N] 29 28 16 69** schreibt, absonderlich was ihr auch **[M] 22 [T] 69 10 28 [G] 38 23** eine**19 24 [E] 11 [R] 35 14 24** gerissen, **fb 37 [N] 29 25 36 [R]** unterredt habt…"
   - W E G E N D E S + 69 = **wegen des Beretti**; M I T + 69 + W E G E N = **mit Beretti wegen**
   - R H E Y R A T H = **[eine]r Heyrath**; fb V N D M I R = **Spanien und mir**
   - Reading: *what you write about Beretti, above all what you discussed with Beretti about a marriage between Spain and me…*
2. p. 416: "…aber sich des **69 [G] 37 32 [R] 35 [V] [C] 24 [E] 23** findt eins theil nit übel…"
   - + 69, G V B R A V C H E N = **Beretti gebrauchen**: *but to make use of Beretti is in some ways not bad…*
3. p. 416: "…erbittert **V[?] [N] 29 28 19 25 36 31 [H]** und **151**…"
   - V N D E R M I C H + 151 = **under (wider) mich und Oesterreich**: *embittered against me and Austria*
4. p. 416: "…kan man suchen **22 24 [M]** all **[C] 20 [N] 15 38 23 36 [E] 23 13** inutili et honorifico zu machen…"
   - I H M + all + C O N V E N I E N Z = **ihm all convenienz** *in utili et honorifico*: *to show him every
     consideration in profit and honour.*
Reading

No3_reading.md

<!-- Reading of No. 3 (Claude Opus 5.5, 23 Oct 2026): the cipher passages of No. 3 in dec_R5018_letters.md (key R5018; register copy, SOA Plzeň inv. 5 book 5), each in the clear words quoted around it there, the cipher in ⟦ ⟧ written as the decoded letters give it (copyist slips noted there; [x] = letters supplied there). An excerpt, one passage per paragraph: the clear letter is quoted only around the passages; the rest is not transcribed in the repository. -->

# No. 3, Charles VI to Count Windischgrätz, Vienna, 24 July 1720: reading of the cipher passages

## Reading

Was nemblich ⟦der Beretti Landi euch Namen⟧ seines ⟦Hofs⟧ über ⟦ein Pr[o]posi[t]ion⟧ gethan eine ⟦Heyrath zwischen⟧ ein oder andern ⟦er meiner Kinder⟧ und ⟦Anjou Söhne⟧ belangt

die antwort erhalten, das ⟦ich⟧ (absonderlich da sich die conjunctur so weit nun geben haben) allzeit nun gehen in ⟦guter Verstendnus⟧ mit ⟦seinen Hof⟧ stehen würde

Was aber ⟦die Heyrath⟧ betrifft, wer⟦en beede so klein⟧, das wohl noch davon nichts kund gemacht werden
Translation

No3_en.md

<!-- English translation of No3_reading.md (Claude Opus 5.5, 23 Oct 2026): the cipher passages (in ⟦ ⟧) of No. 3 in their quoted clear context. An excerpt. -->

# No. 3, Charles VI to Count Windischgrätz, Vienna, 24 July 1720: English translation of the cipher passages

As for what ⟦Beretti Landi⟧ [put] ⟦to you in the name⟧ of his ⟦court⟧ by way of ⟦a proposal⟧ made, a ⟦marriage between⟧ one or other ⟦of my children⟧ and ⟦Anjou's sons⟧

received the answer that ⟦I⟧ (especially now that the conjuncture has turned so far) would always now stand ⟦on good terms⟧ with ⟦his court⟧

But as for ⟦the marriage⟧, ⟦they are both so small⟧ that nothing of it should yet be made known

No. 6, Vienna, 11 Apr 1722 (R5024 copy)

To Windischgrätz as plenipotentiary at the Congress of Cambrai, on his talks with Beretti about a Spanish marriage: Beretti is 'embittered against me and Austria', but it is not bad to make use of him and show him every consideration.

Transcription

dec_R5018_letters.md

# Letters in the second key (R5018): decryptions

Key R5018 (see key5018.md): each letter has a number from 10 to 38 and a graphic sign; the vowels have a second
number. Codes 39–210 and two-letter groups stand for words; 3–7 and 9 are nulls. Words are written
continuously, one symbol per letter. Numbers are from the register copy (SOA Plzeň, RA Windischgrätz, inv. 5,
book 5). Signs are given as the letter they stand for, in brackets, e.g. [E] for the reversed-C sign.
The copyist's sign forms drift: the q-with-crossbars sign serves D and, once, N (in "convenienz"), so the
reading of each sign is settled by the letter-number around it. Every passage below reads as German that fits its clear context.

## No. 2, Vienna, 13 April 1720 (R5021 autograph, R5022 copy, book pp. 404–407)

1. p. 405: "…gut zu machen. Das ob **[V] 23 29 159** sich endlich wider **[M] 36 14 38 [I] 23 35 [N] 29 [E] 19 15 28 [R] 16 14 [E] 23** werden, ist schir zu besorgen…"
   - V N D + 159 → **und Orleans**
   - M I T E I N A N D E R V E R S T E N → **mit einander versten[den]**
   - Reading: *ob … und Orleans sich endlich wider miteinander verstehen werden* (whether … and the Duke of
     Orleans will in the end come to terms with one another again). The subject is presumably Spain, named in the
     clear text just before, which is not transcribed here.
2. p. 405: "…project, hätte wie man sich völlig **37 34 23 [D] [E] [M] 20 23 [E] 19 38 29 28 [R] 54** befreyen könnte…"
   - V O N D E M O N E R E D E R + 54 → **von dem onere der Barriere**
   - Reading: *how one could entirely free oneself from the burden of the Barrier* (the Dutch Barrier fortresses in
     the Austrian Netherlands, whose upkeep the Emperor paid).

## No. 3, Vienna, 24 July 1720 (R5023 copy, book pp. 407–409; autograph not found)

All the cipher is on p. 408.

1. "Was nemblich **29 38 19 69 [E] 37 [C] 24 23 35 [M] 28 [N]** seines **zi** über **[E] 36 23 18 19 [P] 34 16 36 [Z?] [I] 20 23** gethan eine **24 28 11 [R] 35 14 [H] [Z] 10 22 [S] 31 24 [E] 23** ein oder andern **38 [R] [M] 38 22 23 [E] [R] [K] 36 23 [D] 28 19** und **ab [S] 34 24 [N] [E]** belangt…"
   - D E R + 69 = **der Beretti Landi**; E U C H N A M E N = **euch Namen**; zi = **Hof(s)**
   - E I N P R P O S I ? I O N = **ein Proposition** (the copyist wrote P for O and Z for T)
   - H E Y R A T H Z W I S C H E N = **Heyrath zwischen**
   - E R M E I N E R K I N D E R = **[ander]er meiner Kinder**
   - ab S O H N E = **Anjou Söhne** (ab = Anjou, i.e. Philip V of Spain)
   - Reading: *As for what Beretti Landi put to you in the name of his court: a proposal of a marriage between
     one or other of my children and Anjou's sons…*
2. "…die antwort erhalten, das **36 [C] 24** (absonderlich da sich die conjunctur so weit nun geben haben)
   allzeit nun gehen in **[G] 15 14 28 19 37 [E] [R] [S] 14 38 23 29 23 15 16** mit **16 28 22 [N] [E] 23 zi** stehen würde…"
   - I C H = **ich**; G V T E R V E R S T E N D N V S = **guter Verstendnus**; S E I N E N zi = **seinen Hof**
   - Reading: *that I, especially now that the situation has turned this way, would always be ready to stand on good
     terms with his court.*
3. "Was aber **29 22 [E] [H] 38 28 [Y?] 19 35 14 24** betrifft, wer **28 23 32 [E] [D] 28 [S] 34 [K] 21 [E] 22 23**, das wohl noch davon nichts kund gemacht werden…"
   - D I E H E Y R A T H = **die Heyrath** (the copyist wrote an extra E); E N B E D E S O K L E I N = **[wer]en beede so klein**
   - Reading: *As for the marriage: they are both so small that nothing should be made known of it yet.*

## No. 6, Vienna, 11 April 1722, to Windischgrätz as plenipotentiary at the Congress of Cambrai
(R5024 copy, book pp. 414–416)

1. p. 415: "…was ihr **10 38 27 [E] [N] 29 28 16 69** schreibt, absonderlich was ihr auch **[M] 22 [T] 69 10 28 [G] 38 23** eine**19 24 [E] 11 [R] 35 14 24** gerissen, **fb 37 [N] 29 25 36 [R]** unterredt habt…"
   - W E G E N D E S + 69 = **wegen des Beretti**; M I T + 69 + W E G E N = **mit Beretti wegen**
   - R H E Y R A T H = **[eine]r Heyrath**; fb V N D M I R = **Spanien und mir**
   - Reading: *what you write about Beretti, above all what you discussed with Beretti about a marriage between Spain and me…*
2. p. 416: "…aber sich des **69 [G] 37 32 [R] 35 [V] [C] 24 [E] 23** findt eins theil nit übel…"
   - + 69, G V B R A V C H E N = **Beretti gebrauchen**: *but to make use of Beretti is in some ways not bad…*
3. p. 416: "…erbittert **V[?] [N] 29 28 19 25 36 31 [H]** und **151**…"
   - V N D E R M I C H + 151 = **under (wider) mich und Oesterreich**: *embittered against me and Austria*
4. p. 416: "…kan man suchen **22 24 [M]** all **[C] 20 [N] 15 38 23 36 [E] 23 13** inutili et honorifico zu machen…"
   - I H M + all + C O N V E N I E N Z = **ihm all convenienz** *in utili et honorifico*: *to show him every
     consideration in profit and honour.*
Decryption

dec_R5018_letters.md

# Letters in the second key (R5018): decryptions

Key R5018 (see key5018.md): each letter has a number from 10 to 38 and a graphic sign; the vowels have a second
number. Codes 39–210 and two-letter groups stand for words; 3–7 and 9 are nulls. Words are written
continuously, one symbol per letter. Numbers are from the register copy (SOA Plzeň, RA Windischgrätz, inv. 5,
book 5). Signs are given as the letter they stand for, in brackets, e.g. [E] for the reversed-C sign.
The copyist's sign forms drift: the q-with-crossbars sign serves D and, once, N (in "convenienz"), so the
reading of each sign is settled by the letter-number around it. Every passage below reads as German that fits its clear context.

## No. 2, Vienna, 13 April 1720 (R5021 autograph, R5022 copy, book pp. 404–407)

1. p. 405: "…gut zu machen. Das ob **[V] 23 29 159** sich endlich wider **[M] 36 14 38 [I] 23 35 [N] 29 [E] 19 15 28 [R] 16 14 [E] 23** werden, ist schir zu besorgen…"
   - V N D + 159 → **und Orleans**
   - M I T E I N A N D E R V E R S T E N → **mit einander versten[den]**
   - Reading: *ob … und Orleans sich endlich wider miteinander verstehen werden* (whether … and the Duke of
     Orleans will in the end come to terms with one another again). The subject is presumably Spain, named in the
     clear text just before, which is not transcribed here.
2. p. 405: "…project, hätte wie man sich völlig **37 34 23 [D] [E] [M] 20 23 [E] 19 38 29 28 [R] 54** befreyen könnte…"
   - V O N D E M O N E R E D E R + 54 → **von dem onere der Barriere**
   - Reading: *how one could entirely free oneself from the burden of the Barrier* (the Dutch Barrier fortresses in
     the Austrian Netherlands, whose upkeep the Emperor paid).

## No. 3, Vienna, 24 July 1720 (R5023 copy, book pp. 407–409; autograph not found)

All the cipher is on p. 408.

1. "Was nemblich **29 38 19 69 [E] 37 [C] 24 23 35 [M] 28 [N]** seines **zi** über **[E] 36 23 18 19 [P] 34 16 36 [Z?] [I] 20 23** gethan eine **24 28 11 [R] 35 14 [H] [Z] 10 22 [S] 31 24 [E] 23** ein oder andern **38 [R] [M] 38 22 23 [E] [R] [K] 36 23 [D] 28 19** und **ab [S] 34 24 [N] [E]** belangt…"
   - D E R + 69 = **der Beretti Landi**; E U C H N A M E N = **euch Namen**; zi = **Hof(s)**
   - E I N P R P O S I ? I O N = **ein Proposition** (the copyist wrote P for O and Z for T)
   - H E Y R A T H Z W I S C H E N = **Heyrath zwischen**
   - E R M E I N E R K I N D E R = **[ander]er meiner Kinder**
   - ab S O H N E = **Anjou Söhne** (ab = Anjou, i.e. Philip V of Spain)
   - Reading: *As for what Beretti Landi put to you in the name of his court: a proposal of a marriage between
     one or other of my children and Anjou's sons…*
2. "…die antwort erhalten, das **36 [C] 24** (absonderlich da sich die conjunctur so weit nun geben haben)
   allzeit nun gehen in **[G] 15 14 28 19 37 [E] [R] [S] 14 38 23 29 23 15 16** mit **16 28 22 [N] [E] 23 zi** stehen würde…"
   - I C H = **ich**; G V T E R V E R S T E N D N V S = **guter Verstendnus**; S E I N E N zi = **seinen Hof**
   - Reading: *that I, especially now that the situation has turned this way, would always be ready to stand on good
     terms with his court.*
3. "Was aber **29 22 [E] [H] 38 28 [Y?] 19 35 14 24** betrifft, wer **28 23 32 [E] [D] 28 [S] 34 [K] 21 [E] 22 23**, das wohl noch davon nichts kund gemacht werden…"
   - D I E H E Y R A T H = **die Heyrath** (the copyist wrote an extra E); E N B E D E S O K L E I N = **[wer]en beede so klein**
   - Reading: *As for the marriage: they are both so small that nothing should be made known of it yet.*

## No. 6, Vienna, 11 April 1722, to Windischgrätz as plenipotentiary at the Congress of Cambrai
(R5024 copy, book pp. 414–416)

1. p. 415: "…was ihr **10 38 27 [E] [N] 29 28 16 69** schreibt, absonderlich was ihr auch **[M] 22 [T] 69 10 28 [G] 38 23** eine**19 24 [E] 11 [R] 35 14 24** gerissen, **fb 37 [N] 29 25 36 [R]** unterredt habt…"
   - W E G E N D E S + 69 = **wegen des Beretti**; M I T + 69 + W E G E N = **mit Beretti wegen**
   - R H E Y R A T H = **[eine]r Heyrath**; fb V N D M I R = **Spanien und mir**
   - Reading: *what you write about Beretti, above all what you discussed with Beretti about a marriage between Spain and me…*
2. p. 416: "…aber sich des **69 [G] 37 32 [R] 35 [V] [C] 24 [E] 23** findt eins theil nit übel…"
   - + 69, G V B R A V C H E N = **Beretti gebrauchen**: *but to make use of Beretti is in some ways not bad…*
3. p. 416: "…erbittert **V[?] [N] 29 28 19 25 36 31 [H]** und **151**…"
   - V N D E R M I C H + 151 = **under (wider) mich und Oesterreich**: *embittered against me and Austria*
4. p. 416: "…kan man suchen **22 24 [M]** all **[C] 20 [N] 15 38 23 36 [E] 23 13** inutili et honorifico zu machen…"
   - I H M + all + C O N V E N I E N Z = **ihm all convenienz** *in utili et honorifico*: *to show him every
     consideration in profit and honour.*
Reading

No6_reading.md

<!-- Reading of No. 6 (Claude Opus 5.5, 23 Oct 2026): the cipher passages of No. 6 in dec_R5018_letters.md (key R5018; register copy, SOA Plzeň inv. 5 book 5), each in the clear words quoted around it there, the cipher in ⟦ ⟧ written as the decoded letters give it (copyist slips noted there; [x] = letters supplied there). An excerpt, one passage per paragraph: the clear letter is quoted only around the passages; the rest is not transcribed in the repository. -->

# No. 6, Charles VI to Count Windischgrätz, Vienna, 11 April 1722: reading of the cipher passages

## Reading

was ihr ⟦wegen des Beretti⟧ schreibt, absonderlich was ihr auch ⟦mit Beretti wegen⟧ eine⟦r Heyrath⟧ gerissen ⟦Spanien und mir⟧ unterredt habt

aber sich des ⟦Beretti gebrauchen⟧ findt eins theil nit übel

erbittert ⟦under mich⟧ und ⟦Oesterreich⟧

kan man suchen ⟦ihm⟧ all ⟦convenienz⟧ inutili et honorifico zu machen
Translation

No6_en.md

<!-- English translation of No6_reading.md (Claude Opus 5.5, 23 Oct 2026): the cipher passages (in ⟦ ⟧) of No. 6 in their quoted clear context. An excerpt. -->

# No. 6, Charles VI to Count Windischgrätz, Vienna, 11 April 1722: English translation of the cipher passages

what you write ⟦about Beretti⟧, especially what you also discussed ⟦with Beretti about⟧ a ⟦marriage⟧ gerissen [between] ⟦Spain and me⟧

but ⟦to make use of Beretti⟧ is in part not bad

embittered ⟦against me⟧ and ⟦Austria⟧

one can seek to make ⟦him⟧ every ⟦consideration⟧ in profit and honour

Key: key5018.md

04 Sources

The transcription of key R5018 and the decipherments: targets/windischgraetz1720b/ in the repository.