Updated: Feb 4, 2019
The Wilderness Trail was published in 1911 by Charles A. Hanna. It contains "the ventures and adventures of the Pennsylvania traders on the Allegheny path with some new annals of the Old West, and the records of some strong men and some bad ones". The book was published in two volumes, which can be read online for free.
Volume 1 [Alternate link]
Subjects: The Iroquois, Shawnee, Mingoes, Kuskuskies, and other Native American tribes and early settlers.