1To Thomas Jefferson from George Washington, 27 [August] 1790 (Jefferson Papers)
Enclosed is the report (I mentioned to you on our Passage to Rhode-Island) of the Officer who was...
2Enclosure I: Jonathan Heart to Josiah Harmer, 1788 (Jefferson Papers)
The big Beaver empties into the Ohio 29 miles below Fort Pitt, is 150 yards wide at the mouth,...
3Enclosure II: Report on Navigability of Rivers in Northwest Territory, 1788–1789 (Jefferson Papers)
leagues From Post Vincennes to the mouth of the Wabash is called 60 From do. to Tomhoute (no...