Charles Darwin, on the origin of Species (1860), second edition, second impression ('Fifth Thousand'), Charles Darwin, on the origin of Species by Means of natural selection, or the Preservation of Favoured Races in the Struggle for life (John Murray, London, 1860), Octavo, in the publisher's original blocked green cloth with gilt lettered and decorated spine [Freeman's variant a], the publisher's catalogue at the end dated January, 1860