1To Thomas Jefferson from Benjamin S. Barton, 26 July 1790 (Jefferson Papers)
I take the liberty of enclosing to you a paper of Proposals for a work which I have been engaged...
2To Thomas Jefferson from Benjamin Smith Barton, [19 December 1792] (Jefferson Papers)
You will place me under a very great obligation by letting me have, by the bearer of this note,...
3To Thomas Jefferson from Benjamin Smith Barton, 4 January 1793 (Jefferson Papers)
In consequence of your note , I have waited on Mr. Michaux. He assures me, that he will...
4To Thomas Jefferson from Benjamin Smith Barton, 12 [March 1793] (Jefferson Papers)
It is not without a great degree of pain, that I write to you on the subject of this letter. You...
5To Thomas Jefferson from Benjamin Smith Barton, 1 August 1796 (Jefferson Papers)
Mrs. Rittenhouse has received the letter (dated July 3d), which was directed to her excellent...
6To Thomas Jefferson from Benjamin Smith Barton, 5 September 1796 (Jefferson Papers)
Sometime since, I wrote to you, in answer to the letter which you had written to my deceased...
7To Thomas Jefferson from Benjamin Smith Barton, 25 October 1796 (Jefferson Papers)
Your letter has come safe to hand. I am extremely glad to learn, that a number of the bones of...
8To Thomas Jefferson from Benjamin Smith Barton, 26 October 1798 (Jefferson Papers)
I have lately published a new edition of my New Views. I shall endeavour, by the first private...
9To Thomas Jefferson from Benjamin Smith Barton, 10 March 1801 (Jefferson Papers)
I take the liberty of introducing to your knowledge the bearer of this, Mr. Benjamin Rittenhouse....
10To Thomas Jefferson from Benjamin Smith Barton, 9 February 1802 (Jefferson Papers)
I do myself the honour to introduce to your knowledge, one of our countrymen, Dr. John Watkins ,...