SAND (Maurice) The world of butterflies. Promenade à travers champs. Paris, Rothschild, 1867, in-4, brown half-rel. chag., ribbed spine, decorated, gilt head (contemporary binding). With 50 chromolithograph plates. Heavy foxing to text. MULSANT Lettres à Julie sur l'ornithologie. Paris, Morizot, s.d., in-4, green half-rel. chag., ribbed spine (contemporary binding). With 16 chromolithograph plates. Scattered foxing. Set of 2 vol.