on the occasion of the seizure of medieval reason books in Jonas, we found a very useful tool, developed by GDR 2649 under the direction of J.-P. Bardet and F.-J. RUGGIU: a census of the private forum’s written records (books of reason, family books, newspapers, etc.) written between the end of the Middle Ages and the beginning of the twentieth century, and kept in French archives and public libraries. This inventory, even if it is not exhaustive for the Middle Ages, makes...