11Peter S. Du Ponceau to Thomas Jefferson, 22 January 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
12Thomas Jefferson to John Vaughan, 28 May 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
13Thomas Jefferson to Peter S. Du Ponceau, 22 January 1816 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
14Peter S. Du Ponceau to Thomas Jefferson, 24 January 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
15Thomas Jefferson to Peter S. Du Ponceau, 26 January 1817 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
16Thomas Jefferson to Peter S. Du Ponceau, 7 November 1817 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
17Thomas Jefferson to Peter S. Du Ponceau, 6 November 1817 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
18Thomas Jefferson to Benjamin Harrison, 17 January 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
19William Tilghman to Thomas Jefferson, 26 March 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
20Peter S. Du Ponceau to Thomas Jefferson, 12 July 1820 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]