Republished copy of Daniel Bourdeau’s Unsolved Historical Ciphers, released under CC BY 4.0. Text unchanged; hosted by JIC alongside its translations; not an official copy by the author · View the original ↗
xul · zar · xug · zil · ∂ ʇʇ ω ∂ φ f ω y 4 · ton
lo · de · la · con- · t r i b u c i o n · que

Rome → Charles V and Gattinara · three-letter code with a homophonic alphabet of cursive signs · May 1523 – March 1524

Lope Hurtado de Mendoza at Rome to Charles V and Gattinara, 1523–24

Charles V
toCharles V

Real Academia de la Historia, Madrid, Colección Salazar y Castro 9/28 (A-28) and 9/30 (A-30); DECODE R9667, R9683, R9695, R9846, R9866, R9867, R9868, R9869. The catalogue listed them as eight ciphertexts of June 1523 to an unknown recipient, with no decipherment. They are six letters to the Emperor and two to the Grand Chancellor Gattinara, written from Rome between May 1523 and March 1524, in the system of Hurtado’s 1522 letters with a changed key. The key was recovered from adjacent plaintext, the clerk’s clear version of part of one letter; the six letters not calendared by Bergenroth are partly deciphered.

Daniel Bourdeau · posted · updated

Method: key recovered based on adjacent plaintext · Extent: partial (45% of the cipher)

Summary. Lope Hurtado de Mendoza was Charles V’s agent at the court of Adrian VI and then of Clement VII. The key of his 1522 letters, bound in the Salazar volume before these, was recovered on this site from clear versions bound beside them (Lope Hurtado 1522). The eight records of 1523–24 use the same system: three-letter code groups (ton que, zar de, rab vuestra magestad, taf papa) and an alphabet of cursive signs with several signs per letter. Two of them are not new: Bergenroth calendared R9667 (5 May 1523) as CSP Spain ii no. 548 and R9846 (3 and 5 February 1524) as no. 617, from contemporary decipherings. The clerk’s clear version of the first third of the February letter is bound with it on f. 133r. Aligned clause by clause against 38 cipher lines, it gives 105 values, 65 of them confirmed, and shows that the key changed between 1522 and 1524. With that key the six uncalendared letters are partly deciphered, from about a quarter of a letter to about two thirds. They concern Beaurain’s mission to Clement VII, the Pope’s wish to see France ruined or a truce made, the Emperor’s want of money, the departure of the archbishop of Capua, the Datary Giberti, and Hurtado’s unpaid salary. About thirty code groups and a set of look-alike signs stay open.
Folio 130r of RAH Salazar A-30: the opening of the 5 February 1524 letter, three lines in the clear followed by cipher lines
R9846, f. 130r (5 Feb 1524). The letter opens in the clear, “El papa ha holgado con la nueva de la venida de mossiur de Beure…”, and goes into cipher at “para lo de con[tribucion]”: zil con- and the spelled letters t-r-i-b-u-c-i-o-n. Image: Real Academia de la Historia, Colección Salazar y Castro A-30 (9/30) f. 130r, via DECODE R9846.

01 The eight records

The dates come from the date lines, the dockets and, for R9867, from the date spelled out in cipher at the foot. DECODE’s dates, addressees and volume are wrong for several records; the corrections are in the last column.

DECODEff.datetostateDECODE says
R96679/28 ff. 6–9Rome, 5 May 1523Emperorclear with cipher runs; CSP ii 548June 1523, unknown recipient
R96839/28 f. 171Rome, June 1523 (docket 10 June)Emperorclear with 8 cipher linesunknown recipient
R96959/28 ff. 339–340Rome, 8 July 1523Emperorautograph draft, much struck throughJune 1523
R98469/30 ff. 130–133Rome, 3 and 5 Feb 1524Emperoralmost all cipher; clear of the first third on f. 133r; CSP ii 6171523, 9/28
R98669/30 ff. 285–286Rome, 28 Feb 1524Grand Chancellor Gattinarahalf cipher1523, 9/28, unknown recipient
R98679/30 f. 351Rome, 4 Jan 1524Emperorwholly cipher, 30 lines1523, 9/28
R98689/30 ff. 430–431Rome, 20 Mar 1524Grand Chancellor Gattinarahalf cipher1523, 9/28, unknown recipient
R98699/30 ff. 444–445Rome, 28 Mar 1524Emperorhalf cipher1523, 9/28

The Calendar check went through Bergenroth’s CSP Spain vol. 2, pp. 547–709, by the Salazar folio numbers he prints. Only ff. 6–9 of A-28 (no. 548) and ff. 130–133 of A-30 (no. 617) are calendared. The other six letters are not.

R9667 has a leaf headed “Claro” bound beside it, which looks like a crib. It is not one. The leaf is imaged mirrored, and its docket reads “Del abbad de Najera a dos de mayo”: it is the clear of the Abbot of Nájera’s letter of 2 May 1523, not of Hurtado’s of 5 May. For R9667 the content comes from Bergenroth’s abstract, which he made from a contemporary deciphering that is not among the images.

02 The key, from the clear of 5 February 1524

Folio 133r: the clerk's clear version of the February 1524 letter, headed Al Rey de Lope hurtado de v de hebrero MDxxiiij
R9846, f. 133r. The clerk’s clear, headed “Al Rey — de Lope hurtado de v de hebrero MDxxiiij”. Only this page is imaged; it breaks off at “y assegurar el buen animo”. Image: Real Academia de la Historia, Colección Salazar y Castro A-30 (9/30) f. 133r, via DECODE R9846.

The clear on f. 133r covers the cipher of ff. 130r–130v from “para lo de contribucion” to “el buen animo”, and every clause has its cipher counterpart. Most of the letter alphabet came out of spelled runs whose length matches the plaintext word exactly, with known code groups on both sides: contribucion, ayuda, menester, salida, pensar, determinacion. The alignment gave 105 values, 65 of them confirmed (grade C). It also corrected six words of the first transcription of the clear: señorear, poco daño, concierte, deudas, seguir, conservar.

The 1522 key is the starting point, and 25 of its code groups and the signs for n, e, a and o hold in 1524. Some values changed. tef is paz in 1522 and nec- (necesidad, necesario) three times in 1524. The sign L is i in 1522 and r here. So the 1522 key cannot be applied unchanged.

03 What the letters say

Notation: […] marks a passage not yet deciphered. Coverage is the share of cipher tokens that have a value, which is an upper bound: many of them are single letters in runs that do not yet make words. The “reads as Spanish” column is the better measure. Gists are graded M unless stated.

DECODEtokens with a valuereads as Spanishgist
R9667fragmentslittlebenefices for the Pope’s servants (list on f. 7); CSP 548 has the content
R968367/91fragmentsthe Pope well disposed since Volterra’s arrest; restore the benefices of the chamberlain and Francisco (clear)
R9695184/249almost nonerumoured poisoning; the Duke of Camerino’s men still in prison; naturalisations for the Pope’s intimates (clear)
R9846first third from the clearfirst third (C)Beaurain’s coming; the Pope wants France ruined, or else a truce
R9867418/467about 60%Beaurain has left the Pope content; the Emperor must not show need of money
R9866561/649a quarter to a thirdto Gattinara: the French mean to stay this side of the Alps; the writer’s unpaid salary
R9868328/353f. 430r mostlyto Gattinara: Capua gone, all business hangs on the Datary, who must be satisfied
R9869310/339about two thirdsthe Pope’s money offer through Beaurain; Florence undecided; Capua to be well received

5 February 1524, to the Emperor (R9846, CSP 617)

The clerk’s clear, which the cipher of ff. 130r–130v matches clause for clause (grade C):

El papa ha holgado con la nueva de la venida de mossior de Beuvre; spera le con desseo, sera provechosa su venida aqui en esta coyuntura generalmente para todos los negocios y particular para lo de contribucion, que segun hay pocos dineros toda ayuda es menester, fasta ver si la salida del visorey haze retirar los franceses, que donde agora estan haze pensar lo que ha de ser, como quiera que la determinacion del papa es que bayan fuera de Italia. […] Dize me su Sd. que querria una de dos cosas: teniendo v. mad. aparejo, lo que mas dessea es que el Rey de Francia se destruya […]; no pudiendo ser esto, dessea que se tomasse assiento de tregua o paz antes que las cosas de v. mad. veniessen a necessidad.

The Pope is glad of Beaurain’s coming, since money is short and every help is needed until the Viceroy’s march makes the French withdraw; he is resolved that they leave Italy. If the Emperor has the means, what he most wants is for the King of France to be destroyed; if not, a truce or peace before the Emperor’s affairs come to necessity. The rest of the cipher (ff. 131r–132v) is not deciphered here; Bergenroth’s abstract no. 617 gives its content.

4 January 1524, to the Emperor (R9867)

Wholly in cipher, with no clear. The date and signature are spelled at the foot, “de Roma a quatro de enero — Lope Hurtado”, eleven signs for l-o-p-e-h-u-r-t-a-d-o, all but one already in the key.

Mussiur de Beure […] al papa contento de lo que le ha dicho de parte de V. Md. […] el arçobispo con el […]. V. Md. no deve mostrar necesidad, porque […] poco para sacar dineros […] para que los buscasen los que […] no los tienen. […] suplico mande proveer […] de lo que se me deve […]. De Roma a quatro de enero. Lope Hurtado.

28 February 1524, to Gattinara (R9866)

Beaurain’s coming was timely, and Hurtado has briefed him. The French want, by craft or force, to stay on this side of the Alps; the cipher runs give “en no los aver ofendido por esas partes”, “los exercitos de su Mt.”, “en no poder hazer nada”. The Emperor must not lose the world’s respect now that the French are leaving, since he spends so much on the war. Hurtado asks Gattinara to read a chapter he wrote to Soria and to help him get paid what he is owed.

20 March 1524, to Gattinara (R9868)

A copy of Hurtado’s letter of 11 March to the Emperor. The archbishop of Capua has left, and in his absence all business hangs on the Datary, Giberti, who stands as close to the Pope as anyone can. The cipher gives “porque de lo passado era mal contento, segun el lugar que tiene”, “tengolo por inconveniente” and “cada dia me parece mas necesario cunplir con el”: the Datary must be satisfied. Benefices have been shared among the cardinals, as the King of France did with his. The long cipher passage on f. 430v about a valiant man with many sons and nephews not in the Emperor’s pay is not deciphered.

28 March 1524, to the Emperor (R9869)

The Pope has sent Beaurain money proposals, told Hurtado he would fulfil the rest, and pleaded his need; Florence has not yet decided. If the archbishop of Capua finds the army ready to sustain the war, his report will match the Pope’s offer, and the Emperor should see that he is well received. “The Pope’s goodwill and words could not be better; God grant that the deeds be the same.” Easter news, Hungary and the Turk, the Legate in Moravia and the Infante are in the clear.

June and July 1523 (R9683, R9695)

Both letters are mostly in the clear, and little of their cipher lines is deciphered. R9683 says the Pope has been well disposed since the arrest of Cardinal Soderini of Volterra, and asks the Emperor to restore the benefices of the Pope’s chamberlain and of Francisco and to pay what is owed to the Pope. R9695, an autograph draft of 8 July, reports that the rumoured poisoning could not be verified, that the Duke of Camerino’s men are still in prison and that the Pope eats apart, served by old servants; it asks naturalisations for the Pope’s intimates.

04 What remains open

05 Sources

Transcriptions, alignments, the rebuilt key (key_1524.tsv and additions) and the per-letter decipherments are in targets/lopehurtado1523/.