Darwin, Charles. THE FORMATION OF VEGETABLE MOULD through the Action of Worms, with Observations on their Habits. By Charles Darwin, LL.D., F.R.S. With illustrations. Third Thousand. Cr. 8vo, First Edition, Third Thousand; pp. [ii], viii, 326, (adv.); 15 text illustrations, Errata slip, index; original cloth; uncut; a very nice, clean & fresh copy; very scarce. London; John Murray; 1881.