Wilbur Fisk Sanders (1834-1905) was a Bannack, Virginia City, and Helena, Montana, attorney, vigilante, and Republican politician. Collection (1856-1930) includes biographical materials; correspondence (1861-1905); diaries (1866-1867); legal documents; financial records; speeches; historical writings; and miscellany, including scrapbooks. There is a small subgroup of Harriet Peck Fenn Sanders' correspondence (1874-1902) and diaries (1888, undated).