Its Penal Enforcement a Crime: Proved by the Official Evidence in the Reports of the Royal Commission
Letters and Reminiscences, Vol. 2
With a study of the relations of living and extinct faunas as elucidating the past changes of the Earth's surface
A Series of Essays
Letters and Reminiscences, Vol. 1
A Study of the Results of Scientific Research in Relation to the Unity or Plurality of Worlds, 3rd Edition
The Land of the Orang-utan and the Bird of Paradise; A Narrative of Travel, with Studies of Man and Nature
An exposition of the theory of natural selection, with some of its applications