"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M2VD-RWD : accessed 4 February 2017), Cathern Wrenn in household of Patrick Wrenn, Lowell Ward 2, Middlesex, Massachusetts, United States; citing enumeration district (ED) ED 840, sheet 6B, family 125, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 599; FHL microfilm 1,374,612.
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