1st wife of Great Grandfather is Sarah J or M Thompson. She is with her mother and father in the 1870 census in Liberty. In 1880 she is with my great grandfather and his maternal grandparents (the wheatons). However by 1900 my great grandfather is with his second wife Viola Wheat and says they married in 1888. So I am looking for help as to what happened with Sarah Thompson. I need help to determine if they divorced or she died. If anyone can help this would be greatly appreciated.