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.447, e-artnow
Robert Owen (1841). “A development of the principles and plans on which to establish self-supporting home colonies: as a most secure and profitable investment for capital, and an effectual means permanently to remove the causes of ignorance, poverty, and crime”, p.7