DARWIN, Charles (1809-1882). The Formation of Vegetable Mould, through the Action of Worms. London: John Murray, 1881. 8°. Illustrations in the text (title very lightly spotted). Original green cloth, uncut. Provenance: Quentin Keynes (1921-2003, Darwin's great-grandson; a gift to his doctor). FIRST EDITION. Freeman 1357.