United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MFNW-3B7 : 15 July 2017), Mary L Brown in entry for W P Brown, 1880; citing enumeration district ED 150, sheet 41A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d), roll 1302; FHL microfilm 1,255,302.
United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MLM4-MQH : accessed 8 September 2019), Lula E Hovis in household of Charles A Hovis, Clinton, Texas, Missouri, United States; citing enumeration district (ED) ED 101, sheet 1B, family 13, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 826; FHL microfilm 1,374,839.
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: