Hi Isabel, While I was looking for his death info I found the following:
Guthrie Thomson on June 5, 1917 was living at 222 E. Copper St., Butte, Silver Bow, MT. He was an alien. Born: T____ W____ Alberta, Canada on 25 Oct 1893. Occupation: miner, speculator for North Butte Mining? Co. He claimed an exemption in World War I because of his wife and two children. Source: World War I Draft Registration Cards 1917-18.
Guthrie Thomson Born: abt. 1893 Married: 30 Aug 1917, Butte, Silver Bow, MT Father: Alexander D. Thomson Mother: Agnes Gunnyson Spouse: Elizabeth Kinnis Henderson Wright Age: 22 b. abt. 1895 Her Father: John Wright Her Mother: Mary Taylor Source: Montana County Marriages 1865-1950.
I didn't find his death info but I found a volunteer who will look that up at freepages.genealogy.rootsweb.ancestry.com/~obitl/volmt.html .
If that doesn't work out, there's another volunteer at rootsweb.ancestry.com/~mtmsgs/msgs_researchers.htm . Successful Searching!