Find A Grave, database and images (https://www.findagrave.com : accessed 03 June 2019), memorial page for Mary Annettie Sherwood Pierce (11 Jan 1844–21 Mar 1914), Find A Grave Memorial no. 57059731, citing Prague Cemetery, Prague, Lincoln County, Oklahoma, USA ; Maintained by nilraps (contributor 46855722) .
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 DNA with Mary: