Alexander Hamilton, James Madison, John Jay (2015). “The Federalist Papers: A Collection of Essays Written in Favour of the New Constitution”, p.259, Coventry House Publishing
Second lecture on discoveries and inventions, delivered to the Phi Alpha Society of Illinois College at Jacksonville, Illinois, (February 11, 1859); "The Collected Works of Abraham Lincoln, Vol. 3" edited by Roy P. Basler, (p. 357), 1953.