Nathaniel Hawthorne (2015). “Complete Novels of Nathaniel Hawthorne (Illustrated Edition): Fanshawe, The Scarlet Letter with its Adaptation, The House of the Seven Gables, The Blithedale Romance, The Marble Faun, The Dolliver Romance, Septimius Felton, Grimshawe's Secret and Biography”, p.79, e-artnow
Thomas Carlyle, Rodger L. Tarr, Mark Engel (2000). “Sartor Resartus: The Life and Opinions of Herr Teufelsdröckh in Three Books”, p.129, Univ of California Press
George Berkeley (1732). “Alciphron: Or, The Minute Philosopher. In Seven Dialogues. Containing an Apology for the Christian Religion Against Those who are Called Free-thinkers ...”, p.216