4/27/1910 (Emma) was still alive on the census for LeRay, Jefferson, NY ED29 pg 9B
Year: 1930; Census Place: Le Ray, Jefferson, New York; Roll: 1443; Page: ; Enumeration District: 34; Image: 470.0.
On this one Charles is widowed. (Apr 9, 1930)
I couldn't locate them in the 1920 one, but maybe this span will help you in locating the dates for Emogene.