"United States Census, 1880," index and images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MN85-Y51 : accessed 22 April 2015), Leonard Nightingale, Acquackanonck, Passaic, New Jersey, United States; citing enumeration district 137, sheet 175A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0794; FHL microfilm 1,254,794.