1Proceedings of Commissioners to Settle the Pennsylvania-Virginia Boundary, 27–31 August 1779 (Jefferson Papers)
Baltimore, 27–31 Aug. 1779 . After presenting their respective powers, the commissioners for...
2To Benjamin Franklin from David Rittenhouse, 29 April 1780 (Franklin Papers)
ALS : American Philosophical Society Amidst the many important objects of your attention I doubt...
3To Benjamin Franklin from David Rittenhouse, 31 December 1780 (Franklin Papers)
ALS : American Philosophical Society Amidst that Hurry of Business and want of Leisure, which is...
4To 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....
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....
7To 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...
8To James Madison from David Rittenhouse, 10 July 1789 (Madison Papers)
Engaged as you are in business of the greatest importance as well as difficulty, and harrass’d by...
9To James Madison from David Rittenhouse, 19 January 1790 (Madison Papers)
I beg leave to recommend to your favorable notice Mr. Francis Bailey, printer, of this City, as a...
10To Thomas Jefferson from David Rittenhouse, 21 June 1790 (Jefferson Papers)
I received yours of the 12th. 14th. and 17th. together with the several papers mentioned, to...