I found a marriage record abstract for a Sophia Dill who married William A. Rushing on 03 April 1879 in Leake County, Mississippi. I think this William A. Rushing who was born 01 Feb 1851 Leake County, Mississippi, was the son of William Stancil Rushing, born 24 Mar 1828 in Crawford County, Georgia and Died 13 Aug 1899 in Forest, Houston County, Texas, and Caroline F. Boone she was born 12 Mar 1830 in Georgia and died 02 Oct 1920 in Sabine County, Texas.
This William A. Rushing was enumerated in the 1930 San Augustine County, Texas So maybe it is not the one you are looking for. Also his wife is frequently named as Sarah D Rushing and not Sophia or Saphire except in the marriage record.
This William A Rushing has Siblings named: Thomas, Eugenia, Robert Stancil, Theodocia, John R., Blanche and James Milton Rushing. He also has children named: Lloyd, Nellie, Tom, Oscar, Jennie, Fannie and Ella Rushing.
If this sounds promising to you let me know and I will share the details.