↑ see p 174: Letters and Other Papers, 1735-1829 The Virginia Magazine of History and Biography Vol. 23, No. 2 (Apr., 1915), pp. 162-192 Published by: Virginia Historical Society Stable URL: http://www.jstor.org/stable/4243433 Page Count: 31
It may be possible to confirm family relationships with Mary by comparing test results with other carriers of her mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share some percentage (beta) of DNA with Mary: