Edwin Thompson Denig was the resident manager at Fort Union from 1833 to 1856 — a period of twenty-three years during which he interacted continuously with the Crow, Assiniboine, Cree, and other nations of the region.

He married Assiniboine women, learned multiple Indigenous languages, and developed a sophisticated understanding of the societies around him that was, for its era, remarkably empirical.

His writings were not primarily intended for popular audiences.

He was documenting what he knew for professional and scholarly purposes, and that documentary intention shaped his writing in ways that make it more reliable than the popular accounts of the same period.

He was not trying to entertain.