↑ "United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MHHG-7LX : 12 April 2016), John Jacker in household of Francis Jacker, Michigan, United States; citing p. 15, family 101, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,173.
↑ "United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MWSC-V71 : 14 August 2017), Francois Jacker, Schoolcraft, Houghton, Michigan, United States; citing enumeration district ED 8, sheet 592A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0581; FHL microfilm 1,254,581.
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