T.H. McDonald travelled some of the rivers that Alexander Mackenzie travelled upon. His book also provides a transcription of the only remaining manuscript that was the basis for Mackenzie's Voyages from Montreal, a somewhat doctored version of his original writing, altered by an editor:

Mackenzie, Alexander. Exploring the Northwest Territory: Sir Alexander Mackenzie's journal of a voyage by bark canoe from Lake Athabasca to the Pacific Ocean in the summer of 1789 ((Norman, Oklahoma: University of Oklahoma Press, 1966). T. H. McDonald, ed.

[BCBW 2005] "Forts and Fur"