Henrietta B Hixson & Michael Cass Sawyer

My brother-in-law Joe Caven is trying to locate information on his mothers family, she was killed in a car accident and her name was Bessie Caven, along with Joes baby brother.Henrietta and Michael would be his great grandparents, any info would be appreciated, joe is 65 now
Dob for Henrietta 10/31/1850
dob for Michael Cass Sawyer: 9/05/1848