Nathaniel Hawthorne, Herman Melville, Julian Hawthorne (2015). “Life and Genius of Nathaniel Hawthorne: Letters, Diaries, Reminiscences and Extensive Biographies: Autobiographical Writings of the Renowned American Novelist, Author of “The Scarlet Letter”, “The House of Seven Gables” and “Twice-Told Tales””, p.353, e-artnow
Ernest Holmes (1984). “Living the Science of Mind: The Only Writings by the Founder of SCIENCE OF MIND to Help You Understand His Classic Textbook”, p.31, DeVorss & Company