1Thomas Jefferson to de Bure Frères, 13 June 1822 (Jefferson Papers)
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2Thomas Jefferson to Joseph Echols, 23 May 1822 (Jefferson Papers)
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3Thomas Jefferson’s Transactions with James Leitch, 3 March–24 November 1821 (Jefferson Papers)
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4Thomas Jefferson to John Vaughan, 20 April 1821 (Jefferson Papers)
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5Constantine S. Rafinesque to Thomas Jefferson, 3 April 1821 (Jefferson Papers)
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6Constantine S. Rafinesque to Thomas Jefferson, 25 January 1821 (Jefferson Papers)
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7John Hyder to Thomas Jefferson, 14 July 1820 (Jefferson Papers)
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8Thomas Jefferson to Benjamin Vaughan, 23 June 1819 (Jefferson Papers)
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9Louis H. Girardin to Thomas Jefferson, 6 June 1819 (Jefferson Papers)
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10John Laval to Thomas Jefferson, 28 May 1819 (Jefferson Papers)
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