John Quincy Adams (1802). “An Oration, delivered at Plymouth, December 22, 1802, at the anniversary commemoration of the first landing of our ancestors at that place”, p.13
Mark Twain (2014). “Mark Twain on Common Sense: Timeless Advice and Words of Wisdom from America's Most-Revered Humorist”, p.53, Skyhorse Publishing, Inc.