Elaine, I have Robert m Mary Davis, license 1 Dec 1829 p46 in"Worcester County Marriage Records: 1795-1865", (licenses) Jodie Powell.Do you know where St. Mary's Parish was?
There is also a Mary Fooks, wife of Robertburied in Frankford (DE) Methodist Church Cemeteryb 15 Jun 1822 d 25Dec 1858 from "Tombstones of Sussex County Delaware, Volume Two", p80. Possibly a third couple found in 1850 Sussex census, district 3 with children George, Elizabeth, Edward and Laura. Robt 45, Mary 23. (alsopossible that birth on tombstone was 1827 and misread as 1822.) I do not find Robert's death.
And there was Robert m 1844 Mary J. Long b 1829. He may have died soon after.