DARWIN, Charles (1809-1892). On the Various Contrivances by which British and Foreign Orchids are fertilised by Insects. London: John Murray, 1862. 8°. Folding plates, illustrations in the text (without the advertisements). Original cloth gilt, uncut (slightly worn and broken, lower cover detached). Provenance: Sarah Porter (pencilled signature at head of title and book-label of the library of her school) -- Quentin Keynes (1921-2003, Darwin's great-grandson; a gift to his doctor). FIRST EDITION. Freeman 800.