↑ "United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M3DY-L6N : accessed 12 July 2020), John A M Horn in household of Alfred H Horn, Precinct 17 (south part) Jacksonville city Ward 3, Duval, Florida, United States; citing enumeration district (ED) 45, sheet 3A, family 55, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,168.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MVKM-1SV : accessed 12 July 2020), John A Horn in household of Margaret Pierce, Jacksonville Ward 3, Duval, Florida, United States; citing enumeration district (ED) ED 74, sheet 18B, family 114, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 159; FHL microfilm 1,374,172.
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