[Diderot, Denis. (1713–1784)] Rousseau, Jean Jacques. (1712 - 1778) [Rorem, Ned. (1923-2022)] Musique, Contenant 19 Planches...Vol. 7 - FROM THE LIBRARY OF NED ROREMTall Folio. (25. 5 x 39 cm). 22 pages followed by 18 (of 19) plates of music (Nos I XVII and XVI bis; V bis lacking). As this is the extract on music (i. e. Vol. 7) there is no title page etc. Brown paper wrappers with French title in ink and notations in English in pencil in an unknown hand. Scattered toning and light foxing, overall in fine condition throughout. Together with an autograph letter to Ned Rorem from the composer Philip Leslie Wilcher