"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MC52-Q2X : 15 July 2017), Mcclifton Bradbary in entry for Henderson Bradbary, 1880; citing enumeration district ED 49, sheet 338C, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d), roll 1378; FHL microfilm 1,255,378.
No sources. The events of Mark's life were either witnessed by Henry Bradbury or Henry plans to add sources here later.
It may be possible to confirm family relationships with Mark by comparing test results with other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Mark: