Robert Louis Stevenson (2015). “Collected Memoirs, Travel Sketches and Island Literature of Robert Louis Stevenson: Autobiographical Writings and Essays by the prolific Scottish novelist, poet and travel writer, author of Treasure Island, The Strange Case of Dr. Jekyll and Mr. Hyde, Kidnapped & Catriona”, p.473, e-artnow
Douglas MacArthur's address to the Annual Stockholders Sperry Rand Corporation in New York (July 30, 1957) as quoted in "General MacArthur Speeches and Reports 1908-1964" edited by Edward T. Imparato (p. 206), June 14, 2000.