Adam Smith (1853). “The Theory of Moral Sentiments: Or, An Essay Towards an Analysis of the Principles by which Men Naturally Judge Concerning the Conduct and Character, First of Their Neighbours, and Afterwards of Themselves. To which is Added, a Dissertation on the Origin of Languages”, p.219
John Gay (1826). “Gay's Fables and Other Poems: Cotton's Visions in Verse ; Moore's Fables for the Female Sex ; with Sketches of the Authors' Lives”, p.197