Hopefully someone can help me find the death dates of my 3rd great grandparents:

Willard M Wixson (spelling variations, Wixon, Wickson) born abt. 1854 in N.Y. Last residence known 1885 Douglas Co. Badger Precinct (census)

married:

Susan Eliza Wright born Jan 1 1861 Illinois. Also on 1885 census with Willard. On the 1887 census Willard is not listed, only their daughter Lydia May. Susan married Mathew Miller (b. Nov 27 1859 -d. betw: 1901-11) on Dec 12 1888 at her home in Douglas co.

Therefore, Willard died between 1885-87. Can't find any death info. Not sure if Susie and Mathew stayed in the area as Mathew's home was in Grand Forks, B.C.
Thank you for any help.