Henry IV's Cipher from 1590

I added a referene to Savasse (1997) in "French Ciphers during the Reign of Henry IV of France". He reconstructed one of the ciphers of Hurlaut de Maisse, ambassador in Venice. My reconstruction used letters in 1592, while his reconstruction is based on letters from 1590, making it the earliest specimen of Henry IV's ciphers described in this page. (I know one earlier example. I plan to post it some day.) I have quoted Savasse (1997) in the context of Spanish and Florentine ciphers. At that time, this particular cipher did not catch my attention because the name of de Maisse was not familiar to me.