"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MXJV-H7V : 15 September 2017), Parley H Davis in household of Joseph Davis, Waterford, Fulton, Illinois, United States; citing enumeration district ED 58, sheet 420C, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0208; FHL microfilm 1,254,208.