DARWIN, CHARLES. On the Origin of Species . . . New Edition, Revised and Augmented by the Author. Folding diagram. xi, [1], [5]-116, 116*-121*, 117-440, [2] pages, including half-title and final ad leaf. 12mo, 196x125 mm, original cloth, rubbed, spine faded, ends worn, covers partly discolored, rear joint partly cracked; generally clean internally, but with a few gatherings loose. Signature of Henry B. Blackwell dated 1866 on front endleaf. New York: D. Appleton and Company, 1860