Isidore GEOFFROY SAINT-HILAIRE. 3 letters addressed... Lot 40

[Isidore GEOFFROY SAINT-HILAIRE]. 3 letters addressed to him, circa 1850-1860. Letter of 4 pp. in-8 signed with an initials, about an attempt to acclimatize alpacas and llamas in the Alps and which proves to be a failure for the latter. Letter of 4 pp. in-8 (1860, unidentified signature) giving a long report of meetings of the "section des mammifères" and the "section des végétaux". Letter of 3 pp. in-8 from a naturalist, written from Cherbourg on return from an expedition to Africa. "I am sending at the same time a small case of insects, a live trumpet bird for you, a case of shells, an almost complete collection of the Ebrié lagoon (Grand Bassam), an almost complete collection of birds put in skins during the rainy season in Gabon []".