Sixth edition 1875. Fifteenth thousand. printing overall. The book belonged to Henry Young who has also inscribed Notes from Huxley's 1880 lecture 'The Coming of Age of the Origin of Species'. Folding lithographic diagram. Text based on the the sixth edition, published in 1872 the last one that Darwin revised during his lifetime. Book is very good and bright. In the original publishers green cloth with light rubbing to edges. Nice clean contents.