Volume 21: "The descent of man, and selection in relation to sex", second edition, with an essay by T.H. Huxley (1877) Vol I. Volume 22: "The descent of man...", Vol II. Volume 23: "The expression of the emotions in man and animals", second edition, edited by Francis Darwin (1890). Volume 24: "Insectivorous plants", second edition, revised by Francis Darwin (1888). Volume 25: "The effects of cross and self fertilization in the vegetable kingdom", second edition (1878). Volume 26: "The different forms of flowers on plants of the same species", second edition with preface by Francis Darwin (1884). Volume 27: "The power of movement in plants" (1880). Volume 28: "The formation of vegetable mould, through the action of worms, with observations on their habits" (1881). Volume 29: "Erasmus Darwin" by Ernst Krause, with a preliminary notice by Charles Darwin (1879) "The autobiography of Charles Darwin", edited by Nora Barlow (1958). General index.