Letters are in Latin and French; synopsis for each letter and critical matter in English.
v. 1. April 1561 to December 1586 -- v. 2. January 1587 to December 1596 -- v. 3. January 1597 to June 1601 -- v. 4. July 1601 to March 1603 -- v. 5. April 1603 to April 1605 -- v. 6. May 1605 to December 1606 -- v. 7. January 1607 to February 1609 -- v. 8. Appendices, biographical register, index