A noted abolitionist, born in London; trained for the bar, but accepted a post in the London Ordnance Office, which he held until the outbreak of the American War; was a voluminous writer on philology, law, theology, &c., but mainly devoted himself to the cause of negro emancipation, co-operating with Clarkson in founding the Association for the Abolition of Negro Slavery, and taking an active interest in the new colony for freedom in Sierra Leone; won a famous decision in the law-courts to the effect that whenever a slave set foot on English soil he becomes free; he was also one of the founders of the Bible Society (1734-1813).