1From Thomas Jefferson to David Rittenhouse, 19 July 1778 (Jefferson Papers)
I sincerely congratulate you on the recovery of Philadelphia, and wish it may be found uninjured...
2From Thomas Jefferson to David Rittenhouse, 11 November 1784 (Jefferson Papers)
The news of war inevitable in Europe will interest your philanthropy, otherwise it would scarcely...
3To Thomas Jefferson from David Rittenhouse, 28 September 1785 (Jefferson Papers)
That I have so long delayed acknowledging your favours has been owing to my absence from home....
4From Thomas Jefferson to David Rittenhouse, 25 January 1786 (Jefferson Papers)
Your favor of Sep. 28. came to hand a few days ago. I thank you for the details on the Southern...
5To Thomas Jefferson from David Rittenhouse, 26 June 1786 (Jefferson Papers)
Your favour of Jan. 25th. I received some time ago, and likewise all the Nautical Almanacs you...
6To Thomas Jefferson from David Rittenhouse, 14 April 1787 (Jefferson Papers)
About the latter end of June last I sent you the 2d. Vol. of our Transactions, directed to Mr....
7From Thomas Jefferson to David Rittenhouse, 18 September 1787 (Jefferson Papers)
I am now to acknolege the receipt of your favors of April 14. and June 26. as also of the 2d....
8To Thomas Jefferson from David Rittenhouse, 8 November 1788 (Jefferson Papers)
About two Months ago I received your very valuable present of Books, mentioned in the last letter...
9From Thomas Jefferson to David Rittenhouse, 12 June 1790 (Jefferson Papers)
I know not what apology to make for the trouble I am about to give you. I am sure I must call...
10From Thomas Jefferson to David Rittenhouse, 1[5] June 1790 (Jefferson Papers)
I inclosed you, the day before yesterday a rough draught of the report I had prepared on the...