NY: Appleton, 1871. First American edn. Two volumes. 8vo, pp. vi, 409; v, 436, plus catalog. Index. Illustrated. Rust cloth. Hinges near tender in Vol. I, Spine cloth chipped at extremities, cut to the cloth on the spine just below the author's name. Some toning to the leaves. A good set. Item #47817
Darwin's most famous work after On The Origin of Species, and the one in which the word evolution first appears--on page 2 of the first volume--before its appearance in the sixth edition of On The Origin of Species the following year. (Freeman).