1Isaac Briggs to Thomas Jefferson, 7 May 1816, with Postscript by Mary B. Briggs (Jefferson Papers)
Thy kind favor, of Apr 17. 16 , had been forwarded from Brookeville to this place, my present residence, during a second journey I have made to Washington City . I returned yesterday. While in the Metropolis, I conceived an expectation, which is not still exists, of an employment s either in the survey of the line between the United States and the British possessions, from the source of S t