David Hume, Eric Steinberg (1993). “An Enquiry Concerning Human Understanding ; [with] A Letter from a Gentleman to His Friend in Edinburgh ; [and] An Abstract of a Treatise of Human Nature”, p.29, Hackett Publishing
Nelson A. Miles (1992). “Personal Recollections and Observations of General Nelson A. Miles, Embracing a Brief View of the Civil War, Or, From New England to the Golden Gate and the Story of His Indian Campaigns with Comments on the Exploration, Development, and Progress of Our Great Western Empire”, p.345, U of Nebraska Press