I found an Elizabeth Wilson living with her daughter Elizabeth Hutchinson and her husband James in the 1900 census for Payette Precinct, Canyon Couty, Idaho. It states that Elizabeth Wilson is the Mother-in-law. She was born June of 1832. She immigrated in 1883 and has been living in the United States for 17 years.
She is still living with her daughter(Betsy who is now a widow)in Payette Idaho in the 1910 census.
I found an announcement of the death of Elizabeth Wilson in the following newspaper:
December 1, 1919
Elizabeth Wilson, born in Aberdeen, Scotland, died in Payette, November 16, in her 83rd year.
I found a death certificate number for an Elizabeth Wilson:
01/99/1833 - 11/15/1919
Maybe if you contact the following, they might help you to get a copy of the death certificate.
The Library staff will do research and lookups.
They can be contacted at:
IDAHO STATE HISTORICAL SOCIETY LIBRARY AND ARCHIVES
450 N. 4th Street
Boise, ID 83702-6027
Tel: 208-334-3356 or 208-334-3357
Fax: 208-334-3198 http://www.idahohistory.net/
I also found an obituary for James Hutchinson. I will post it seperately, just in case you don't have it.