One of the Oldest French Ciphers Solved (1525/1526?)

The oldest French ciphertexts known date from 1525 or 1526, some of which still remain unsolved.
One of them is now solved by Norbert Biermann. It is written in the margin at the bottom of a letter dated 25 September [1525 or 1526?] from Jean de Calvimont to Antoine Duprat. See "French Ciphers during the Reign of Francis I".
Norbert solved Louvois-Lauzun Code (the one that the famous codebreaker John Wallis could not solve) last year by finding the key in the archives (see "French Ciphers during the Reign of Louis XIV" (5)). I hope he will solve more unsolved ciphers in my list.