My husband's grandfather, Marvin Lynn Graham was born in Texas, June 1922 to William E and Mary Sue Graham. He had two siblings Mary Bell and Edward. I found Mary Bell (abt 1917), William E (abt 1894) and Mary (abt 1900) on a 1920 Census in Lubbock TX. But I cannot find anything on them afterwards. Mary Sue divorced William E, and later married Richard Richardson. I have no dates on those. I would like to move backwards on this family tree. Please help, I am stuck!