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The Correspondence of Thomas Jefferson By Subject - T Taxation / and Credit Issues to George Washington, 4 November 1788 Taxation / Excise Taxes to James Madison, 28 December 1794 Threats to Liberty to Phillip Mazzei, 24 April 1796 Trade to James Monroe, 17 June 1785 Treaties / Commercial to Richard Henry Lee, 22 April 1786 Trigonometry to William Green Mumford, 18 June 1799 Truth as Foundation of Morality to Thomas Law, Esq., 13 June 1814