Living with her parents in 1860; there is also a one-year-old boy named Elijah, presumably her child. Some suggest she married a Sebourn, but I think this is an error.
Death reported in a database as 11 Apr 1908, Locust Grove, Mayes Co, OK, age 74. But this was her sister Elizabeth who married William C. Harrison and she was living with her son Jack in Indian Territory in 1900.
Databases have daughters with all combinations of the names Mary, Margaret and Martha. She appears twice with her parents as Margaret - no Mary or Martha noted. Mary sometimes given a husband, James Brandenburgh, but I've never been able to find such a couple. I found instead a Margaret of the right age with a son Elijah of the right age, married to Elijah Brandenburgh, sho was from Owsley Co and whose mother was a Bowman. In 1850, Elijah was at home with his parents John & Deborah (Bowman) Brandenburgh, age 12. In 1860, Elijah, was age 22, living with the Farmer family in Owsley Co.
1870. Marion Twp, Lawrence Co, IN Hh 50
Found living in French Lick, Orange Co IN in 1880:
Margaret E. GABBARD and Elijah BRANDENBURG were married circa 1863 in Owsley County, Kentucky. Elijah BRANDENBURG, son of John Henson BRANDENBURG and Deborah BOWMAN, was born on 1 July 1837 in Owsley County, Kentucky. He died on 1 February 1896 at the age of 58 in Orange County, Indiana.