"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MWXW-Y4K : accessed 22 July 2015), Mary E Swart in household of Jacob Swart, Windham, Bradford, Pennsylvania, United States; citing enumeration district 35, sheet 574A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 1105; FHL microfilm 1,255,105.