E. D. W. Hatch, Popular Science Monthly (1885)
“ These descriptions, written many years ago, with others at hand not necessary to repeat, apply well to the trade-rat of the Rocky Mountains, save that they do not mention the creature's curious habit of barter. I have already spoken of their great strength and celerity of movements. To an observer these traits are a never-failing surprise. If a light is steadily burning and all is quiet, they are easily watched, darting back and forth, carrying goods each way—round trip, so to speak, and often long trips. ”
