Susan Hannigan lived with Michael and his wife from 1870 to 1880. in 1870, her grandparents were also living with him.
Sources
"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZ55-M7T : accessed 10 December 2015), Michael Mccarty, Pennsylvania, United States; citing p. 244, family 1923, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,904
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MWJR-5VF : accessed 10 December 2015), Michael Mccarty, Philadelphia, Philadelphia, Pennsylvania, United States; citing enumeration district 506, sheet 342B, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 1183; FHL microfilm 1,255,183.
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