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...
11To James Madison from Isaac Briggs, 17 May 1803 (Madison Papers)
I take the freedom of introducing to thee, and to thy amiable family, my youngest brother Joseph...
12To Thomas Jefferson from Isaac Briggs, 17 May 1803 (Jefferson Papers)
Permit me to introduce to thee my youngest brother, Joseph Briggs, who is going with me to the...
13To Thomas Jefferson from Isaac Briggs, 8 September 1803 (Jefferson Papers)
On the 12th. of the month just past, I arrived at Natchez;—on the day following I waited on...
14To Thomas Jefferson from Isaac Briggs, 2 January 1804 (Jefferson Papers)
Some time ago—very long after its date—the mail brought me thy favor of the 11th. of August. I...
15To Thomas Jefferson from Isaac Briggs, 27 February 1804 (Jefferson Papers)
I am here, with Robert Williams, on my way to the seat of Government. We expect to sail for...
16To Thomas Jefferson from Isaac Briggs, 28 May 1804 (Jefferson Papers)
I had intended to be in the City this day—but my aged Father having come one hundred and thirty...
17To Thomas Jefferson from Isaac Briggs, 2 September 1804 (Jefferson Papers)
Attending to the necessary observations under the frequent interruption of clouds—keeping a...
18To Thomas Jefferson from Isaac Briggs, 2 October 1804 (Jefferson Papers)
No doubt it is matter of surprise that we proceed so slowly. Indeed when I undertook this journey...
19To Thomas Jefferson from Isaac Briggs, 26 November 1804 (Jefferson Papers)
I am just arrived here in safety and good health after a journey, of the unavoidable delays,...
20To Thomas Jefferson from Isaac Briggs, 22 December 1804 (Jefferson Papers)
Although still in state of convalescence, and but just able to attend to business a few minutes...
21To Thomas Jefferson from Isaac Briggs, 31 December 1804 (Jefferson Papers)
By last mail, I sent my report of the Post Road—by the present I send a duplicate. I have not yet...
22To Thomas Jefferson from Isaac Briggs, 29 January 1805 (Jefferson Papers)
From New-orleans I sent by mail my report of the Post Road dated 22nd. of the 12th. mo. 1804, and...
23To Thomas Jefferson from Isaac Briggs, 9 February 1805 (Jefferson Papers)
My last letter to thee was dated at this place, 29th. of the month just past, a few days after my...
24To Thomas Jefferson from Isaac Briggs, 16 March 1805 (Jefferson Papers)
Being informed that the office of United States’ Attorney for the district of Orleans is now...
25To James Madison from Isaac Briggs (Abstract), 20 April 1805 (Madison Papers)
20 April 1805, Washington, Mississippi Territory . “There is reason to expect that there will be...
26To Thomas Jefferson from Isaac Briggs, 11 May 1805 (Jefferson Papers)
Some time ago I received thy acceptable letter of March 14. ’05. I have written to Governor...
27To Thomas Jefferson from Isaac Briggs, 18 May 1805 (Jefferson Papers)
By last mail, on the 11th. instant, I wrote to thee acknowledging the receipt of thy acceptable...
28To Thomas Jefferson from Isaac Briggs, 31 October 1805 (Jefferson Papers)
Having heard that the Commissioners for adjusting and reporting the evidences of claims to land...
29To Thomas Jefferson from Isaac Briggs, 9 December 1805 (Jefferson Papers)
I am apprehensive that what I am about to write would by a mind less benevolent than thine be...
30To Thomas Jefferson from Isaac Briggs, 3 March 1806 (Jefferson Papers)
About 12 days ago, I returned from an excursion up the Mississippi river. The object of this...