DARWIN, CHARLES The Formation of Vegetable Mould, Through the Action of Worms, with Observations on Their Habits. London: John Murray, 1881.8vo, publisher's green cloth, gilt-lettered spine. Third thousand, with one page publisher's advertisements at rear and numerous in-text engravings. Light wear to boards; ends bumped; bookseller's sticker tipped to front pastedown; hinges starting.