Alexander Pope, John Wilson Croker, Whitwell Elwin, William John Courthope (1871). “The Works of Alexander Pope: New Ed. Including Several Hundred Unpublished Letters, and Other New Materials, Collected in Part by John Wilson Croker. With Introd. and Notes by Whitwell Elwin”, p.87
"Daniel J. Levitin Q&A: 'We've created more information in the past few years than in all of human history before us'". Interview with Lisa O'Kelly, www.theguardian.com. January 18, 2015.