Factual error: Two women come into town somewhere around San Luis Valley, Colorado with ring-necked Pheasants. The pheasants were brought into US a few times (East coast, CA) but really did not get established until late 1880s and in Colorado likely in the late 1890s (eastern and southwestern). The problem is it supposedly depicts the year 1880. They would more likely may have found some Gunnisons Sage-Grouse nearby or rabbits. (00:16:10)
Factual error: Roy has a letter from his brother Jim who has apparently made a home in Atascadero Ca, however it wasn't established until 1913.
Shot the Head off a Snake - S1-E5
Factual error: Frank Griffin makes a reference to Burma Shave in the 1880s. Burma Shave didn't appear until 1925.