Letter from Horace Walpole to the Earl of Harcourt, 17 September 1778, in W. S. Lewis et al. (eds.) 'Horace Walpole's Correspondence' vol. 35 (1973) p. 489
Joseph Addison (1827). “A Selection [- Second Selection] from the Paper of Addison: In the Spectator and Guardian, for the Use of Young Persons”, p.236
"He can see clearly now / Third Eye Blind's Stephan Jenkins looks at success, love, creativity". Interview with Julian Guthrie, www.sfgate.com. April 20, 2003.