1To Benjamin Franklin from John Jay, [18] June 1779 (Franklin Papers)
..., Historical Society of Pennsylvania, University of Pennsylvania Library, Harvard University...
2To Benjamin Franklin from William Alexander, [19 March 1780] (Franklin Papers)
...Pennsylvania, University of Pennsylvania Library, Library of Congress, Pendleton...
3To Benjamin Franklin from Samuel Huntington, 4 January 1781 (Franklin Papers)
...of Pennsylvania, University of Pennsylvania Library; copies: National Archives,...
4To Benjamin Franklin from Samuel Huntington, 5 July 1781 (Franklin Papers)
...of Pennsylvania, University of Pennsylvania Library; copies: Historical Society of...
5To Benjamin Franklin from Robert R. Livingston, 26 November 1781 (Franklin Papers)
...Society of Pennsylvania, University of Pennsylvania Library; al (draft): New-York...
6To Benjamin Franklin from Robert Morris, 4 December 1781 (Franklin Papers)
: Historical Society of Pennsylvania, University of Pennsylvania Library; copy: Library of Congress
7To Benjamin Franklin from Robert Morris, 17 April 1782 (Franklin Papers)
Historical Society of Pennsylvania, University of Pennsylvania Library; copy: Library of Congress
8To Benjamin Franklin from Robert R. Livingston, 22 May 1782 (Franklin Papers)
...Philosophical Society, Historical Society of Pennsylvania, University of Pennsylvania...
9To Benjamin Franklin from Robert Morris: Two Letters, 23 May 1782 (Franklin Papers)
...Society, Historical Society of Pennsylvania, University of Pennsylvania Library; copy: Library...
10Thomas Jefferson to Caspar Wistar, 25 August 1814 (Jefferson Papers)
Pennsylvania, University of [index entry]
11Thomas Jefferson to Thomas Appleton, 6 March 1815 (Jefferson Papers)
Pennsylvania, University of [index entry]
12Thomas Jefferson to Stephen Cathalan, 6 March 1815 (Jefferson Papers)
Pennsylvania, University of [index entry]
13Thomas Jefferson to William H. Crawford, 6 March 1815 (Jefferson Papers)
Pennsylvania, University of [index entry]
14Thomas Jefferson to Adamo Fabbroni, Antoine Gouan, Lacepede, Marc Auguste Pictet, and André Thoüin, 6 March 1815 (Jefferson Papers)
Pennsylvania, University of [index entry]
15Thomas Jefferson to Philip Mazzei, 6 March 1815 (Jefferson Papers)
Pennsylvania, University of [index entry]
16Thomas Jefferson to John A. Morton, 6 March 1815 (Jefferson Papers)
Pennsylvania, University of [index entry]
17Thomas Jefferson to Antonio Dugnani, 7 March 1815 (Jefferson Papers)
Pennsylvania, University of [index entry]
18Caspar Wistar to Thomas Jefferson, 27 April 1815 (Jefferson Papers)
Pennsylvania, University of [index entry]
19Andrew C. Mitchell to Thomas Jefferson, 23 June 1815 (Jefferson Papers)
Pennsylvania, University of [index entry]
20Charles Willson Peale to Thomas Jefferson, 7 July 1816 (Jefferson Papers)
Pennsylvania, University of [index entry]
21Thomas Jefferson to Elizabeth Trist, 23 November 1816 (Jefferson Papers)
Pennsylvania, University of [index entry]
22Thomas Cooper to Thomas Jefferson, 16 September 1817 (Jefferson Papers)
Pennsylvania, University of [index entry]
23Thomas Cooper to Thomas Jefferson, 19 September 1817 (Jefferson Papers)
Pennsylvania, University of [index entry]
24Thomas Cooper to Thomas Jefferson, 24 October 1817 (Jefferson Papers)
Pennsylvania, University of [index entry]
25José Corrêa da Serra to Thomas Jefferson, 31 October 1817 (Jefferson Papers)
Pennsylvania, University of [index entry]
26Thomas Jefferson to James Madison, 15 November 1817 (Jefferson Papers)
Pennsylvania, University of [index entry]
27Thomas Cooper to Thomas Jefferson, 20 November 1817 (Jefferson Papers)
Pennsylvania, University of [index entry]
28Thomas Jefferson to Thomas Cooper, 25 November 1817 (Jefferson Papers)
Pennsylvania, University of [index entry]
29Thomas Jefferson to José Corrêa da Serra, 25 November 1817 (Jefferson Papers)
Pennsylvania, University of [index entry]
30Thomas Cooper to Thomas Jefferson, 6 December 1817 (Jefferson Papers)
Pennsylvania, University of [index entry]