"United States Census, 1850," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:M8RM-JQ5 : 20 December 2020), Cornelius Elder, Knox, Knox, Illinois, United States; citing family , NARA microfilm publication (Washington, D.C.: National Archives and Records Administration, n.d.).
"United States Census, 1880," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MXV7-34M : 13 January 2022), Cornelius D. Elder, Haw Creek Township, Knox, Illinois, United States; citing enumeration district , sheet , NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm .
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