9 books
On Caesar's Account of Britain and Its Inhabitants in Reference to Ethnology
The Horse
On the Relation of the Domesticated Animals to Civilisation
On the Origin of the Gypsies
On the Aryan, or Indo-Germanic Theory
China and Its Trade
A Few Notes on Sir Charles Lyell's 'antiquity of Man'
On the Theory of the Origin of the Species by Natural Selection in the Struggle for Life
A Grammar and Dictionary of the Malay Language