- Thomas Clarkson and Ottobah Cugoano: Essays on the Slavery and Commerce of the Human Species
- The History of the Rise, Progress, and Accomplishment of the Abolition of the African Slave-Trade, by the British Parliament; Volume 2
- The History of the Rise, Progress and Accomplishment of the Abolition of the African Slave Trade by the British Parliament (1808); Volume 1
- An Essay on the Slavery and Commerce of the Human Species: Particularly the African; Translated From a Latin Dissertation, Which Was Honoured With the ... University of Cambridge, for the Year 1785
- A Portraiture of Quakerism. Taken From a View of the Education and Discipline, Social Manners, Civil and Political Economy, Religious Principles and Character, of the Society of Friends; Volume 1