[DIDEROT (Denis). Lettre sur les sourds et muets, à l'usage de ceux qui entendent & qui parlent. [Followed by:] Lettre sur les aveugles, à l'usage de ceux qui voient. Amsterdam [Paris ?], s.n., 1772. In-12, marbled calf, smooth spine decorated, red edges (period binding). First collective edition of these two seminal texts by Diderot: the Lettre sur les aveugles in its most complete edition, with additions, and the Lettre sur les sourds. The illustration includes 11 engraved plates outside the text. "Sold separately", according to Adams, the volume was reunited with the edition of the Œuvres philosophiques published at the Amsterdam address. Cuffs bumped. Joints slightly rubbed.