"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MDWS-3R5 : 15 July 2017), David L Mc Cormac in household of Sarah Mc Cormac, District 5, Morgan, Tennessee, United States; citing enumeration district ED 133, sheet 567C, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 1273; FHL microfilm 1,255,273.