M. O. Skarsten was professor emeritus at Pacific University in Forest Grove, Oregon when he wrote George Drouillard: Hunter and Interpreter for Lewis and Clark . The book is the standard biography of Drouillard, a hunter and interpreter, who played a primary role in the success of the Lewis and Clark expedition. Following the Expedition, Drouillard became a partner in the fur trade with Manuel Lisa. Drouillard was killed in 1810 while trapping on the upper Missouri River.
From the guide to the Skarsten (M. O.) Publication Files for George Drouillard, 1963-1964, (Lewis & Clark College Special Collections and Archives)