David Hume (1874). “A Treatise on Human Nature: Being an Attempt to Introduce the Experimental Method of Reasoning Into Moral Subjects; and Dialogues Concerning Natural Religion”, p.306
Henry St John's letter to Alexander Pope, as quoted in "The Work of Lord Bolingbroke: With a Life, Prepared Expressly for this Edition, Containing Additional Information Relative to His Personal and Public Character, Selected from the Best Authorities. In Four Volumes. Volume III", 1841.
Harriet Ann Jacobs (2015). “Incidents in the Life of a Slave Girl: An Autobiographical Account of an Escaped Slave and Abolitionist”, p.18, Skyhorse Publishing, Inc.