11Thomas Jefferson to John Vaughan, 20 April 1821 (Jefferson Papers)
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12Constantine S. Rafinesque to Thomas Jefferson, 25 January 1821 (Jefferson Papers)
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13Francis Adrian Van der Kemp to Thomas Jefferson, 7 January 1818 (Jefferson Papers)
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14Benjamin Smith Barton to Thomas Jefferson, 13 [April] 1815 (Jefferson Papers)
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15John Hyder to Thomas Jefferson, 14 July 1820 (Jefferson Papers)
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16Thomas Jefferson to John Laval, 8 May 1819 (Jefferson Papers)
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17Francis Adrian Van der Kemp to Thomas Jefferson, 5 April 1818 (Jefferson Papers)
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18Thomas Jefferson to Benjamin Vaughan, 23 June 1819 (Jefferson Papers)
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19Benjamin Vaughan to Thomas Jefferson, 16 April 1819 (Jefferson Papers)
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20John F. Watson to Thomas Jefferson, 2 June 1814 (Jefferson Papers)
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21Thomas Jefferson to Regnault de Bécourt, 20 June 1813 (Jefferson Papers)
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22“Johannes Vonderpuff” to Thomas Jefferson, 1 October 1814 (Jefferson Papers)
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23Louis H. Girardin to Thomas Jefferson, 6 June 1819 (Jefferson Papers)
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24John Laval to Thomas Jefferson, 28 May 1819 (Jefferson Papers)
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25Thomas Jefferson to de Bure Frères, 13 June 1822 (Jefferson Papers)
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26Regnault de Bécourt to Thomas Jefferson, 26 May 1813 (Jefferson Papers)
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27Regnault de Bécourt to Thomas Jefferson, 9 August 1813 (Jefferson Papers)
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28Thomas Jefferson’s Transactions with James Leitch, 3 March–24 November 1821 (Jefferson Papers)
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29Hosea Humphrey to Thomas Jefferson, 31 December 1815 (Jefferson Papers)
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