"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MDW7-SXK : 15 July 2017), Sarah J A Brown in entry for Huston Brown, 1880; citing enumeration district ED 224, sheet 329D, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d), roll 1275; FHL microfilm 1,255,275.
Source: S-1010524321 Repository: #R-1349419655 1900 United States Federal Census Ancestry.com Publication: Ancestry.com Operations Inc
It may be possible to confirm family relationships with Sarah by comparing test results with other carriers of her ancestors' 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 Sarah: