1Thomas Jefferson to Peter S. Du Ponceau, 22 January 1816 (Jefferson Papers)
I have been 4. of the last 5. months absent from home, which must apologise for this very tardy...
2Thomas Jefferson to Peter S. Du Ponceau, 26 January 1817 (Jefferson Papers)
I promised you in my letter of Jan. 22. 16. to make enquiry on the subject of the MS. journal of...
3Thomas Jefferson to Peter S. Du Ponceau, 6 November 1817 (Jefferson Papers)
The long delay of the MS. of Col o Byrd which you were so kind as to send me , needs apology. on...
4Thomas Jefferson to Peter S. Du Ponceau, 7 November 1817 (Jefferson Papers)
A part of the information of which the expedition of Lewis and Clarke was the object has been...
5Thomas Jefferson to Peter S. Du Ponceau, 7 November 1817 (Jefferson Papers)
Th: Jefferson presents his compliments to M r Duponceau , & his thanks for his pamphlet on...
6Thomas Jefferson to Peter S. Du Ponceau, 30 December 1817 (Jefferson Papers)
An absence of 6. weeks has occasioned your letters of the 5 th & 11 th inst to lie thus long...
7Thomas Jefferson to Peter S. Du Ponceau, 17 January 1818 (Jefferson Papers)
Your favors of the 5 th & 6 th are recieved, and I am sorry it is not in my power to interest any...
8Thomas Jefferson to Peter S. Du Ponceau, 19 February 1818 (Jefferson Papers)
your favor of Jan. 24. was duly recieved, and I now inclose you the supplements for the three...
9Thomas Jefferson to Peter S. Du Ponceau, 14 March [1819] (Jefferson Papers)
I thank you, dear Sir, for the valuable volume of your historical transactions which you have...
10Thomas Jefferson to Peter S. Du Ponceau, 7 July 1820 (Jefferson Papers)
I have lately had an opportunity of procuring a copy of a Vocabulary of the Nottoway tribe of...
11Thomas Jefferson to Peter S. Du Ponceau, 28 December 1820 (Jefferson Papers)
This letter is strictly confidential. some time ago a mr John Sanderson , of Philada , addressed...
12Thomas Jefferson to Peter S. Du Ponceau, 31 March 1821 (Jefferson Papers)
Your favor of the 23 d is recieved. the acquaintance I had the pleasure of forming with mr...
13From Thomas Jefferson to Peter Stephen Duponceau, 16 November 1825 (Jefferson Papers)
Th: Jefferson returns his thanks to the Board of Directors of the society for the Commemoration...