Mary Dorothy Cassingham was born 11 Apr 1901 in Champaign, Champaign, Illinois. Dorothy, as she was known, is the daughter of Ora Walker Cassingham and Elmira Rebeka Burns. She died 17 Jul 1986 at age 85 in Houston, Harris, Texas.

On 11 Jul 1923, she married Frank Lindell Peterson (Sr.) in Champaign, Champaign, Illinois .

Children of Mary Dorothy Cassingham and Frank Lindell Peterson (Sr.):

1. Jerry Burns Peterson
2. Frank Lindell Peterson (Jr.)

Sources

Mary: Birth and Death from the Social Security Death Index (SSN 336-44-7928). Last residence is assumed to be the deathplace.
Death corroborated by Texas Deaths, 1964-1996.