B. L. Rayner, Thomas Jefferson (1834). “Life of Thomas Jefferson: with selections from the most valuable portions of his voluminious and unrivalled private correspondence : with portrait”, p.423
Thomas Jefferson, Henry Augustine Washington (1854). “The Writings of Thomas Jefferson: Being His Autobiography, Correspondence, Reports, Messages, Addresses, and Other Writings, Official and Private : Published by the Order of the Joint Committee of Congress on the Library, from the Original Manuscripts, Deposited in the Department of State”, p.4