See Foote also for history of the first Presbyterian ministers in the Back Country.

As to political history, inaccurate.
Early History And Exploration J.S.Bassett (editor), "The Writings of Colonel William Byrd of Westover." New York, 1901.

A contemporary record of early Virginia.
Thomas Walker, "Journal of an Exploration in the Spring of the Year 1750." Boston, 1888.

The record of his travels by the discoverer of Cumberland Gap.
William M.Darlington (editor), "Christopher Gist's Journals." Pittsburgh, 1893.

Contains Gist's account of his surveys for the Ohio Company, 1750.
C.A.Hanna, "The Wilderness Trail," 2 vols.