Is she the same person as her sister, Letitia??
1860 TN census: Living in Johnson co. with parents and sibling (SV-240)
1860 census indicates she was born ca. 1854 (SV-240)
1870 Johnson Co., TN Census: Aged 18 living with parents and 10 siblings. (SV-1355)
No Mary FRITTS is bured in Johnson Co., TN. (SV-1360)