"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MN8W-P8H : 12 August 2017), Thomas Cummisky in household of John Cummisky, Jersey City, Hudson, New Jersey, United States; citing enumeration district ED 8, sheet 188D, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0782; FHL microfilm 1,254,782.