"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MN6W-27Z : 17 October 2014), Peter Hartley in household of Cornelius Hartley, New Jersey, United States; citing p. 17, family 149, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,384.