1To George Washington from Andrew Ellicott, Benjamin Ellicott, and Isaac Briggs, 29 June 1793 (Washington Papers)
We trust we have manifested, during our employment in the city of Washington, our zeal for its...
2To Thomas Jefferson from Isaac Briggs, 24 January 1801 (Jefferson Papers)
As a member of the American Philosophical Society I take the liberty of addressing its President....
3To Thomas Jefferson from Isaac Briggs, 30 January 1802 (Jefferson Papers)
Will the President do me the favor to accept the enclosed pamphlet ; and the additional one to...
4To Thomas Jefferson from Isaac Briggs, 26 April 1802 (Jefferson Papers)
It was with a high degree of satisfaction, I observed in a letter I lately received from my...
5To Thomas Jefferson from Isaac Briggs, 26 June 1802 (Jefferson Papers)
Wilt thou condescend to inform me, if a letter I wrote, dated 26th. of the 4th. Month 1802, ever...
6To James Madison from Isaac Briggs, 11 October 1802 (Abstract) (Madison Papers)
11 October 1802, Baltimore. “I take the liberty of sending for deposit in thy office, as evidence...
7To James Madison from Isaac Briggs, 1 January 1803 (Madison Papers)
Having failed, when I was last in the City of Washington, to procure satisfactory information,...
8To James Madison from Isaac Briggs, 22 February 1803 (Abstract) (Madison Papers)
22 February 1803, Washington. “I am directed by the American Board of Agriculture to request thy...
9To Thomas Jefferson from Isaac Briggs, 1 March 1803 (Jefferson Papers)
Agreeably to my promise , I have investigated thy Problem for finding the longitude by lunar...
10To Thomas Jefferson from Isaac Briggs, 2 May 1803 (Jefferson Papers)
Thy letter, dated 20th. of April, I received yesterday. I have had several applications for...