French philosopher, art critic, and writer (1713–1784), best known for serving as co-founder and chief editor of and contributor to the Encyclopédie, the most important and ambitious intellectual initiative of the 18th Century. Autograph receipt, in French, signed “Diderot,” one page, 7 x 4.5, no date. Receipt for part of his contribution to the Encyclopédie, signed at the conclusion by Diderot. Translated: “Received from Mr. Lebreton for the same work as in the preceding receipts, and for the eight volume and the explanation of the plates, three hundred livres, Paris.” A central vertical fold, small ink notation, and scattered light toning and soiling, otherwise fine condition. Lebreton was the bookseller who published the 60 illustrated volumes of the Encyclopédie. A most significant document in terms of 18th Century thought. RRAuction COA.