Mark Twain (2017). “MARK TWAIN Ultimate Collection: 370+ Titles in One Volume (Illustrated): The Adventures of Tom Sawyer & Huckleberry Finn, The Prince and the Pauper, The £1,000,000 Bank Note, A Horse’s Tale, Yankee in King Arthur's Court, The Innocents Abroad, Life on the Mississippi…”, p.1507, e-artnow
Frances Wright (1829). “Course of popular lectures as delivered by Frances Wright: with three addresses on various public occasions, and a reply to the charges against the French reformers of 1789. Second edition”, p.55