I uploaded a new article "Codebreaking through Comparison of Two Independently Enciphered Texts", which presents my solution of a cipher used in a letter from Abel Servien to Melchior de Sabran (1632). It was quite simple a job, because some words in the clear gave a clue. More interesting would be the very comparison of the two independently enciphered ciphertexts.
I also added references to unsolved ciphers in Sabran's letters in "French Ciphers during the Reign of Louis XIII" and "Unsolved Historical Ciphers."
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