Two Ciphers Broken by George Lasry

Two of unsolved ciphers presented in "Unsolved Historical Ciphers" have been solved by George Lasry.
One is a ciphertext (Senecey to Archbishop of Lyon) left undeciphered by François Viète (see "Ciphers Broken by François Viète").
The other is an Italian letter in the French archives (see "Undeciphered Letters in BnF fr.4715").
Senecey's cipher employs as many as 79 symbols in a relatively short ciphertext, and was very hard to break even with his sophisticated computer algorithms, which appear to have solved the Italian letter in an instant. I look forward to a paper detailing his method.