"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MNZK-K6J : accessed 3 August 2015), Peter Roughgarten, Midland, Bergen, New Jersey, United States; citing enumeration district 8, sheet 400C, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0771; FHL microfilm 1,254,771.