From "History of La Crosse County, Wisconsin", 1881, p. 750. City of La Crosse WILLIAM DUNCAN, policeman, has been on the police force in North La Crosse since the spring of 1876. He is a native of Canada, born at Kingsley Falls, Province of Quebec, in 1847; son of John and Margaret (Strutch) Duncan, natives of Scotland. Came to Wisconsin in the spring of 1867, and has resided in La Crosse since that time. He was engaged in lumbering, as foreman for L. R. Stafford, for several years, and afterward for Hogan & Chamberlain. He was married in 1872, in La Crosse, to Eliza A., daughter of Thomas Elliott, and has two children, Edna and Mabel. [I am not related to this family and have no further information. I'm posting this as a service and hope it helps!]