[MESMER (F. A.)]. CORRESPONDENCE... ON THE NEW DISCOVERIES OF THE OCTOGON BAQUET, the man-Baquet and the Moral Baquet. Libourne et Paris, chez les marchands de nouveautés, 1785. Small in-12 of 167-[1] pages, half red long-grained morocco (later binding). FIRST EDITION. Correspondence collected by Fortia de Piles, Journiac de Saint-Médard and Louis de Boisgelin, decorated with 4 engraved plates of which 3 folding and 1 with music (Caillet 7417). RARE EXAMPLE ON BLUE PAPER of the contributors (Louis de Boisgelin), with his bookplate. A fine copy.