James Madison (1836). “The Debates in the Several State Conventions on the Adoption of the Federal Constitution: As Recommended by the General Convention at Philadelphia in 1787. Together with the Journal of the Federal Convention, Luther Martin's Letter, Yates's Minutes, Congressional Opinions, Virginia and Kentucky Resolutions of '98-'99, and Other Illustrations of the Constitution”, p.399
Thomas Jefferson, Barbara B. Oberg (1950). “The Papers of Thomas Jefferson, Volume 29: 1 March 1796 to 31 December 1797”, p.271, Princeton University Press