[ROUSSEAU, Jean Jacques (1712-78)]. Series of engravings for La nouvelle Heloise and Emile. 8° (185 x 126mm). 25 plates, proofs before letters, and a portrait, dated 1779-1780, after Marilllier by Ingoulf, de Ghendt, etc. [with] an autograph letter signed from Marillier to Le Préfet, Boissise la Bertrand, 17 February 1808, one page, 4to on Marillier's nomination for the Mayority of the town (a little spotted). Early 19th-century red straight-grained morocco, gilt key border and a wavy border of foliage around sides, gilt edges. Provenance: Thomas Baring (bookplate) -- Mortimer L. Schiff (bookplate; his sale, 7 July 1938, lot 1193).