"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.
Abraham Lincoln, Don Edward Fehrenbacher (1977). “Abraham Lincoln, a Documentary Portrait Through His Speeches and Writings”, p.124, Stanford University Press