"United States Census, 1880," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MXJR-6YX : accessed 3 February 2015), Henry Post, Danforth, Iroquois, Illinois, United States; citing enumeration district 128, sheet 153C, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0214; FHL microfilm 1,254,214.