↑ "Indiana Marriages, 1811-2007," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:XX5T-6JV : 8 April 2021), Isaac C Hays and Mary A Craig, 10 Jun 1871; citing Clay, Indiana, United States, Marriage License, Indiana Commission on Public Records, Indianapolis; FHL microfilm 004476675.
↑ "United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MH9S-D13 : 19 February 2021), Isaac C Hays, Wright, Greene, Indiana, United States; citing enumeration district ED 298, sheet 80C, NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm 1,254,280.
↑ "United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MM14-1JR : accessed 29 May 2021), Isaac Hayes, Smith Township, Greene, Indiana, United States; citing enumeration district (ED) 34, sheet 4B, family 80, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,374.
↑ "United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MKGR-9X9 : accessed 29 May 2021), Isaac C Hays, Richland, Greene, Indiana, United States; citing enumeration district (ED) ED 36, sheet 4B, family 57, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 352; FHL microfilm 1,374,365.
↑ "United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XHM2-9PZ : accessed 29 May 2021), Isac U Hayes in household of Charles M Hayes, Jasonville, Greene, Indiana, United States; citing enumeration district (ED) ED 25, sheet 5A, line 34, family 103, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 590; FHL microfilm 2,340,325.
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