Gabriel BEXON (1747-1784), naturalist, collaborator of Buffon. P.S., co-signed by Charles Joseph Panckoucke, Paris July 8, 1780; 2pages small in-4 (slight wetness, small hole). Contract between publisher Panckoucke and Bexon, who undertakes to supply "L'histoire naturelle de l'homme, des animaux quadrupèdes, des Oiseaux, des Poissons, extraits en partie de l'Encyclopédie [...] et en outre toutes les généralités relatives à la Théorie de la Terre; le dit ouvrage par ordre alphabétique, pour faire partie de l'Encyclopédie Méthodique, dont le dit Sr Panckoucke est actuellement occupé". Bexon undertook to give him the entire work by the end of 1782. For his part, Panckoucke promises to "pay M. Bexon the sum of twenty-four livres per each leaf in 4to of the said Dictionary, Cicero's character", half in cash and half at the end of the work, and Bexon will be entitled to a complete copy of this "new Methodical Encyclopedia". This contract is approved and signed by Liège booksellers Jean-Jacques Deveria and Clément Plomteux.