Will of Lucy C. Blunt of the County of Greensville and State of Virginia. Warren Co., NC, Original Wills, w. 11 Apr 1837, p. Greensville Co., VA, 7 Aug 1837. Admitted to probate, Warren Co., NC, August Court 1837. Digital image at Ancestry.com - https://ancstry.me/2Dal55c
Will of John M. Walker. Brunswick Co., VA, WB 10, p. 356, w. 30 Jan 1826, p. 28 May 1827. Digital image at Ancestry.com - https://ancstry.me/2UciYUh
It may be possible to confirm family relationships with Mary by comparing test results with other carriers of her ancestors' mitochondrial DNA.
Mitochondrial DNA test-takers in the direct maternal line: