You won’t find higher quality primary sources about the fur trade from the perspective of North West Co clerks/bourgeois and early, independent traders.
Of particular interest are two different perspectives at the exact moment the NWC and the XY Company merged, and, of course, all the rough conditions, variable food sources/supply chains, sudden illness, spontaneous violence, and kegs of ardent spirits and debt as the most common forms of currency that you could expect from any honest depiction of the industry.
The book was very interesting. I had a hard time figuring out the Pond journal entries as his spelling was horrible but it was interesting. There was a great description of Grand Portage in the MacDonell section. It was interesting reading the instruction from McLeod to Hamon. And I really enjoyed Thomas Conners entries.