Guicciardini's Ciphers (ca.1590-1593)

A new article "Florentine Ciphers of Guicciardini (ca.1590-1593)" presents two ciphers of Giacomo Guicciardini from past publications. One is polyphonic and is similar to another polyphonic cipher related to the Grand Duke of Tuscany.
In addition to these, reference is made to a cipher of James Guicciardini. James was near the Grand Duke of Tuscany about the same time as Giacomo, but they may be different persons. If I find out anything more, I will update the article.

Gustave Bergenroth's Papers

I uploaded "Bergenroth's Papers on Spanish Ciphers in PRO 31/11/11
" and added a link to it in "Spanish Ciphers during the Reign of Ferdinand and Isabella".

Codebreaking without Knowing the Language

I uploaded "Is Codebreaking Possible without Knowing the Language?".
I also updated "John Davys and the Art of Deciphering" mentioned therein (by mainly correcting grammar and adding links).

Three Vatican Ciphers Solved

My new article "Identifying Italian ciphers from continuous-figure ciphertexts (1593)" has been released online (Cryptologia). For the time being, you can get it free here.
I added a reference to this in related articles:
"Variable-Length Symbols in Italian Numerical Ciphers"
"Unsolved Historical Ciphers"
"Ciphertext-only Attack on "Vatican Challenge" Ciphers (1625, 1628)"

My solution is only preliminary. I hope someone will complete the solution and tell me what is written.

Philip II's First Cipher (1543)

I uploaded "Philip II's First Cipher (1543)", which shows a reconstruction of Prince Philip's cipher when he was only sixteen. (Probably, the cipher was handled by a secretary.)
I also added a subsection for this cipher in "Ciphers during the Reign of Emperor Charles V".

Spanish Ciphers: 1470-1479

In mid November, I uploaded “Spanish Ciphers before Accession of King Ferdinand: 1470-1479” at Academia.edu.
While the nineteenth-century historian Bergenroth once said Spanish ciphers were “simple and primitive” for about fifteen years after 1480, Spanish ciphers before 1480 are found in archives. I reconstructed Spanish ciphers used by Ferdinand the Catholic in letters to his father, King John II of Aragon in the 1470s. Two of them turned out to be rather complex.