perché dice che [ɱ ·: ᴗ ∂ ⟩ E ℘] [π ⊔ 6 ·:’ ⟩ H] [ç …] [+o ⚲ ♀ ⊔ ô +o ʓ H]
perché dice che MADONNA [è] PURE FEMINA E SOSPETOSA
·: H ℘ ɣ = A · ⟩ E 9 = N · +o ∂ = O · ô = T · q = null

Urbino → the Signoria of Florence · homophonic letter cipher with word signs · early 1425 · read

Galeotto da Ricasoli to the Dieci di Balía, Urbino, early 1425

Archivio di Stato di Firenze, Dieci di Balía, Responsive 2 no. 171 (old 168), DECODE R3754, listed as non-decrypted: a one-page letter of Florence’s envoy to Count Guidantonio da Montefeltro, in fast Florentine cursive with about twenty runs of cipher. The abbé Gabbrielli rebuilt the key in 1863 from a few words he glossed on this letter and three others; Meister printed his table in 1902. The letter itself was never printed.

The three long runs Gabbrielli left unread are decoded here sign by sign, using his glosses as seeds and his key for alignment. His null list is corrected on two points, and four new sign values are confirmed on the sibling letters.

Daniel Bourdeau · solved

Summary. The Dieci di Balía, Florence’s war council, kept its incoming letters in filze of Responsive; the earliest ciphered ones date from the war with Milan in 1424. Galeotto Fibindacci da Ricasoli wrote this one from Urbino, where he was Florence’s envoy to Count Guidantonio da Montefeltro, in the months after the Florentine defeat at Zagonara. In 1863 the archivist Pietro Domenico Gabbrielli glossed a few words over the cipher of this and three sibling letters and built a key from them, warning that it rested “on a few words in only four letters”. Aloys Meister printed the key in 1902. Nobody printed the letters, and DECODE lists this one as non-decrypted. Here the glossed runs were first checked against Gabbrielli’s table, then the three long runs he had not read were aligned sign by sign. They say that the Count calls his wife, Caterina Colonna, Martin V’s niece, “after all a woman, and suspicious”. They also say that her relatives and the citizens were to bind themselves in secret to the Count’s wishes, “whatever she says or wants to the contrary”. Checking against Gabbrielli’s null row showed one of his nulls is a variant A and confirmed another. Four new sign values hold on the siblings nos. 21 and 91. Status: read. The cipher runs are all decoded; two word signs are read from Gabbrielli’s marks and the context, five letter values rest on this letter alone, and some words of the fast clear hand are uncertain (section 05).
ASF Dieci di Balia Responsive 2 no. 171: a one-page letter with runs of cipher signs and small interlinear glosses
Dieci di Balía, Responsive 2 no. 171, the whole letter (deskewed). The dark small hand between the lines is Gabbrielli’s 1863 gloss. Archivio di Stato di Firenze, via DECODE R3754.

01 The letter, the key and the siblings

The letter opens “Magnifici potenti Signori miei” and is signed “Vostro servidore Galeotto de Fibindacci”. It is undated. Its siblings in the same hand, filza 3 nos. 91 and 92, are dated at Urbino on 17 and 28 February, in the Florentine year 1424, that is 1425. Guasti’s edition of the Commissioni di Rinaldo degli Albizzi shows the Dieci sending Galeotto to the Count of Urbino in September 1423, and prints a later clear letter of his from Urbino of 28 August 1425. “Madonna” is the Countess, Caterina Colonna, niece of Pope Martin V, who married Guidantonio in 1424 and reached Urbino on 4 March 1424.

The key is page 1 of Gabbrielli’s volume Chiavi delle cifre delle lettere ai Dieci di Balía dal 1424 al 1530, compiled in 1863–64. The volume is on the Ilardi microfilm at Yale, reel 58, and Meister printed page 1 in Die Anfänge der modernen diplomatischen Geheimschrift (1902), p. 50. It is headed “Cifra di Galeotto Fibindacci da Ricasoli, carteggio dei X di Balía, an. 1424”. It gives an alphabet with two or three signs for most letters, eighteen nulls, and a nomenclator of thirty word signs such as Conte d’Urbino, Duca di Milano, Malatesta, fanti and mille. It also lists six cover words written in clear: Giovanni for the Dieci, Andrea for Galeotto, trombetta for an ambassador, che for horse, con for war and tagliato for loss.

Gabbrielli marked the letters he worked from in the margin: filza 1 nos. 163 and 165, filza 2 no. 72 and filza 3 nos. 21, 91 and 92. His interlinear glosses on no. 171 cover a dozen words: paolo, di madona, cintadini, il conte, sarrem andino, a laog., ambasciatore, puro femina e sospettosa, el conte d’Urbino, cavalli, parenti and madonna. Several of these sit over runs far longer than the gloss, and two of them are misreadings.

02 The three unread runs

Each run was cut from the deskewed scan at four to five times magnification and transcribed sign by sign. The signs were then matched against Gabbrielli’s table and his gloss. Capitals are the decoded text.

“Madonna è pure femina e sospetosa”

The run after 'perche dice che', with Gabbrielli's gloss 'madonna ... puro femina e sospettosa' above it
The run after “perché dice che”, with Gabbrielli’s gloss above. It continues onto the next line.

The clear text runs: “… che disputa Giovanni [the Dieci] mandasse trombetta [an ambassador], perché dice che”. Twenty-six signs follow. MADONNA is seven signs, all in Gabbrielli’s table. PURE has P and R and E from his table and one new sign. FEMINA is six signs, all his. E is his. SOSPETOSA is nine signs. The two O signs in it stand exactly five places apart, as the two O’s of s-o-spet-o-sa do, and that fixes the alignment. Gabbrielli glossed the whole phrase but never tabulated the signs in it. The sentence reads: “because he [the Count] says that Madonna is, after all, a woman, and suspicious”.

“Parenti e citadini”

The run glossed 'parenti' and 'cintadini'
The run before “promettessono e obligassensi”, glossed parenti and cintadini.

The run has seven signs and then eight. With Gabbrielli’s values for P, A, R, E and I and three new ones, they read PARENTI and CITADINI, one letter per sign. The sentence reads: “et segretamente MADONNA et PARENTI [e] CITADINI promettessono e obligassensi che, non obstante [ella] dicesse e volesse el contrario, … farebbono quello volesse [il Conte]”. In English: Madonna’s relatives and the citizens should secretly promise and bind themselves that, whatever she might say or want to the contrary, they would do what the Count wished.

“Acomandino a lui”

Gabbrielli read this run as sarrem andino and the next word as a laog. Both are misreadings. The first sign is on his own list of nulls. The next ten are A C O M A N D I N O by his table and by values proved elsewhere on the page. The last three are A L I, with one sign doubtful, and read a lui. The clause reads: “che non li pare che [the Pope?] si[a] …; acomandino a lui”, “that they put themselves in his hands”.

03 The letter

This is a working text. The clear hand is fast. Words marked (?) are doubtful. Cipher is given in capitals and word signs in brackets.

Magnifici potenti Signori miei, io sono stato qui mostrato per lettera … fatto questa mia, sentito PAOLO, … non n’averavamo e parlato però di una cosa et dell’altra, che sterino insieme più … DI MADONNA et CITADINI [il Conte] … ma prosetto(?) che non li pare che [il Papa?] si[a] … ACOMANDINO A LUI; sono stati così parecchi … parlare, ma parebbe fusse più utile che qualunque commissione portata persona fusse et motivare de’ ragionamenti, che disputa Giovanni mandasse trombetta, perché dice che MADONNA [È] PURE FEMINA E SOSPETOSA, pure vedrendosi(?) coperto, se sapesse a fare, sapere et bene; ma non staza così coperto. Anno sospetto di questo [CONTE D’URBINO], detto non credo bisogni, ma pure delle cose … avere sospetto; o detto … el modo che li parebbe farebbe dimostrare fare … [FANTI] et guache(?); che [cavalli] e segretamente … dessi loro opera che metassono, et segretamente MADONNA et PARENTI [E] CITADINI promettessono e obligassensi che, non obstante [ella] dicesse e volesse el contrario, dico essi farebbono quello volesse [il Conte]. E ragionamenti furono assai e lunghi … ma parmi volesse andasse più segreta. Racomandomi alla Signoria vostra. Vostro servidore Galeotto de Fibindacci.

In short: Galeotto reports long talks at Urbino about the Countess. Some party, probably under the Pope’s protection, should put itself in the Count’s hands. He advises the Dieci to send an ambassador, because the Count distrusts his wife: “Madonna is after all a woman, and suspicious”. Foot and horse are to be engaged quietly. Her relatives and the citizens are to bind themselves, in secret, to follow the Count whatever she says. He ends that the business should be kept more secret.

04 The key corrected and extended

Gabbrielli’s table fixed about two-thirds of the signs in the three runs. The rest were set by alignment with his glosses and then checked. Signs he listed as nulls were tested against his null row, reread from the Yale film.

SignValueWhere it holdsGrade
ɣAno. 171 three times; no. 91 mandatoH
+oOno. 171 three times; no. 21 andaronoH
9Nno. 171 parenti; no. 21 ne andaronoH
ô, o with a cross aboveTno. 171 sospetosa; no. 21 tante e tali twiceH
Tno. 171 parenti onlyC
#Ino. 171 citadini onlyC
ᴗ as CCno. 171 citadini only; the same shape is D elsewhereM
π as SSno. 171 sospetosa only; Gabbrielli and FEMINA give FM
ʓSno. 171 sospetosa only; close to a Gabbrielli nullM

05 What remains uncertain

06 Sources

Sign-by-sign alignments, the working transcription, the null-row check and the sibling tests are in the repository (florence1429/). Page images are not committed; the crops on this page are for study.