- Life of Henry David Thoreau
- A Plea for Vegetarianism, and Other Essays; 1886
- Animals' Rights, Considered in Relation To Social Progress
- The Logic of Vegetarianism: Essays and Dialogues
- A Voyage to Abyssinia, and Travels Into the Interior of That Country: Executed Under the Orders of the British Government, In the Years 1809 and 1810: ... On the East Coast of Africa, Visited In