"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZGN-2R4 : accessed 24 September 2015), Eliza Sargent in household of James S Espy, Pennsylvania, United States; citing p. 42, family 368, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,833.