Henry David Thoreau (2014). “Citizen Thoreau: Walden, Civil Disobedience, Life Without Principle, Slavery in Massachusetts, A Plea for Captain John Brown”, p.49, Graphic Arts Books
"Advice to a Young Tradesman, Written by an Old One" by Benjamin Franklin and D. Hall, printed in George Fisher "The American Instructor: or Young Man’s Best Companion" (pp. 375-377), founders.archives.gov. July 21, 1748.