1Peter S. Du Ponceau to Thomas Jefferson, 12 July 1820 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
2Thomas Jefferson to Peter S. Du Ponceau, 14 March [1819] (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
3Thomas Jefferson to John Vaughan, 28 May 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
4William Tilghman to Thomas Jefferson, 26 March 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
5Peter S. Du Ponceau to Thomas Jefferson, 24 February 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
6Thomas Jefferson to Peter S. Du Ponceau, 19 February 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
7Peter S. Du Ponceau to Thomas Jefferson, 14 February 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
8Peter S. Du Ponceau to Thomas Jefferson, 24 January 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
9Peter S. Du Ponceau to Thomas Jefferson, 22 January 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
10Thomas Jefferson to Peter S. Du Ponceau, 17 January 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
11Thomas Jefferson to Benjamin Harrison, 17 January 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
12Peter S. Du Ponceau to Thomas Jefferson, 6 January 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
13Peter S. Du Ponceau to Thomas Jefferson, 5 January 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
14Thomas Jefferson to Peter S. Du Ponceau, 30 December 1817 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
15Peter S. Du Ponceau to Thomas Jefferson, 11 December 1817 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
16Peter S. Du Ponceau to Thomas Jefferson, 5 December 1817 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
17Thomas Jefferson to Peter S. Du Ponceau, 7 November 1817 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
18Thomas Jefferson to Peter S. Du Ponceau, 6 November 1817 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
19Thomas Jefferson to John Quincy Adams, 1 November 1817 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
20Thomas Jefferson to Peter S. Du Ponceau, 26 January 1817 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
21Peter S. Du Ponceau to Thomas Jefferson, 8 February 1816 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
22Thomas Jefferson to Peter S. Du Ponceau, 22 January 1816 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]