1Thomas Jefferson to Alexander Hepburn, 18 September 1819 (Jefferson Papers)
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2Thomas Jefferson to Thomas Eston Randolph, 10 September 1822 (Jefferson Papers)
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3Thomas Jefferson to James Rawlings, 31 July 1817 (Jefferson Papers)
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4Thomas Jefferson to Archibald Thweatt, 16 March 1817 (Jefferson Papers)
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