"United States Census, 1880," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MXJW-H9B : accessed 26 February 2015), Jacob Frieling, Englewood, Cook, Illinois, United States; citing enumeration district 198, sheet 346B, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0200; FHL microfilm 1,254,200.