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
Robert Louis Stevenson (2015). “The Complete Poetry of Robert Louis Stevenson: A Child's Garden of Verses, Underwoods, Songs of Travel, Ballads and Other Poems by a prolific Scottish writer, author of Treasure Island, The Strange Case of Dr. Jekyll and Mr. Hyde, Kidnapped”, p.186, e-artnow