At the time of the 1900 U.S. Federal Census William Bennett, aged 43, born (Aug 1856) in England, lime quarryman), and wife of 13 years Julia A. Bennett, aged 34, born (Feb 1866) in Michigan USA, no children, were living in Red Mountain, Silver Bow, Montana.
In 1910 William Bennett, aged 54, born in England, manager of lime quarry, and wife of 23 years Jewell Bennett, aged 44, born in Michigan, no children, were living in Precinct 44, Silver Bow, Montana.
William Bennett was living in Butte, Montana, in 1933, according to the obituary of his brother Samuel Dunn Bennett.
In 1940 William Bennett, aged 83, born in England, widower, was living in Election Precinct 63, Silver Bow, Montana.
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William Bennett, of Maiden Rock near Melrose, born in Cornwall, England, farmer, miner, son of Henry Bennett and Susan Valeneweth, died aged 85 years 10 months 11 days. 1