I was at the library today:
I do not find Catherine Divens on either the Idaho
or Washington death indices.

The copier is not working but here is a transcribe of the death cert. for Nathan DIVENS if it helps.

Died Near Santa Benewah County
June 1 1926 Certificate # 54134
informant David Delaney(the same man who Nathan is living with in the 1920 census)
Nathan P.Divens born Dec. 6 1849 Single
retired rancher born Adams County Ohio
died of Chorecpsitius???? (very hard to read)
buried Emida Cemetery Benewah County
Father John Divens born Wakesburg Ohio
Mother Catherine Dillinger born Jenkins Springs Ohio