August 14, 1779ľAugust 7, 1780 | Journal Daniel Smith's Journal (1779-1780) In 1779, with other surveyors and adventurers from Virginia and North Carolina, Daniel Smith and Thomas Walker set out to extend the Virginia-North Carolina boundary line far beyond the Cumberland Gap. From August 1779 until August 1780, the men traveled from southern Virginia, to the Falls of the Ohio River, and back to Virginia. In addition to their survey duties, the men worked secretly for Thomas Jefferson, meeting with George Rogers Clark at the Falls of the Ohio River to scout locations for the planned Fort Jefferson.
January 24, 1784 | Letter Thomas Jefferson to Thomas Hutchins, January 24, 1784 Thomas Jefferson writes to geographer Thomas Hutchins with questions and remarks about one of Hutchins' pamphlets, "A Topographical Description of Virginia, Pennsylvania, Maryland and North Carolina, Comprehending the Rivers Ohio, Kenhawa, Sioto, Cherokee, Wabash, Illinois, Mississippi, &c...With a Plan of the Rapids of the Ohio, A Plan of the Several Villages in the Illinois Country, a Table of the Distances Between Fort Pitt and the Mouth of the Ohio." In his remarks, Jefferson notes several mistakes in the work.
February 11, 1784 | Letter Thomas Hutchins to Thomas Jefferson, February 11, 1784 Thomas Hutchins responds to Thomas Jefferson's January 24, 1784 note questioning calculations made in one of Hutchins' pamphlets, "A Topographical Description of Virginia, Pennsylvania, Maryland and North Carolina, Comprehending the Rivers Ohio, Kenhawa, Sioto, Cherokee, Wabash, Illinois, Mississippi, &c...With a Plan of the Rapids of the Ohio, A Plan of the Several Villages in the Illinois Country, a Table of the Distances Between Fort Pitt and the Mouth of the Ohio."
March 1, 1784 | Report Resolutions from the Committee for the Western Territory, March, 1, 1784. With Jeremiah Townley Chase and David Howell, Thomas Jefferson issues recommendations for the division and government of the western edges of United States territory. The preferred boundaries of future states are laid out and vaguely classical and Indian names are given the various regions. Congress did not adopt the Ordinance as Jefferson submitted it, primarily rejecting the abolition of slavery in the region and Jefferson's nomenclature. As passed by Congress, it became the Ordinance of 1784.
July 13, 1787 | Letter Northwest Ordinance, July 13 1787. Setting the stage for western expansion, the Northwest Ordinance of 1787 shaped the development of the territory north and west of the Ohio River.
August 27, 1790 | Report George Washington to Thomas Jefferson, August 27, 1790 George Washington asks for Thomas Jefferson's opinions on a variety of security concerns on the United States' western borders, particularly given the threat of British/Spanish hostilities. Jefferson answered on August 28, 1790.
March 10, 1793 | Report Thomas Jefferson to George Washington, March 10, 1793 In his official capacity as Secretary of State, Thomas Jefferson writes to George Washington, reiterating the boundaries of the western frontiers of the United States, particularly as they apply to treaties with Native groups.
January 18, 1803 | Report Thomas Jefferson to United States Congress, January 18, 1803 Thomas Jefferson's confidential report to Congress planned westward expansion and the United States' relationship with Native Americans.