"Wisconsin, County Marriages, 1836-1911," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XR66-62R : 17 March 2018), Edward L. Blank and Mary J. Wheeler, 30 Jan 1878; citing , Sauk, Wisconsin, United States, Wisconsin Historical Society, Madison; FHL microfilm 1,275,559.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MNHN-L3B : 14 September 2017), Mary Blank in entry for Edward Blank, 1880; citing enumeration district ED 260, sheet 217A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d), roll 1446; FHL microfilm 1,255,446.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MM28-FW5 : accessed 22 June 2019), Mary J Blank, Reedsburg city Ward 1-2, Sauk, Wisconsin, United States; citing enumeration district (ED) 142, sheet 10A, family 239, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,816.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MPV3-GGS : accessed 22 June 2019), Mary J Blank, Reedsburg Ward 2, Sauk, Wisconsin, United States; citing enumeration district (ED) ED 124, sheet 1A, family 5, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1736; FHL microfilm 1,375,749.