[DIDEROT, DENIS.] Lettre sur les Sourds et Muets, à l'Usage de ceux qui entendent & qui parlent. 3 engraved plates. x, 241, [11] pages, with cancelled state of A2, D4, L5, and E1. bound with: Additions pour server d'Éclaircissemens à quelques endroits de la Lettre sur les Sourds & Muets. 2 engraved plates. [2], 241-400, [4] pages, including errata leaf at end followed by title page of the third printing of the main work. 12mo, 147x89 mm, contemporary sheep with leather lettering piece, spine faded, rear cover discolored and chipped along joint; occasional light marginal toning or soiling, 2 small stains on half-title of the Additions. Bookplate of Francis John Hughes. Np, 1751