"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M3S5-PFH : accessed 10 August 2018), Martha Dayton in household of John Dayton, Letterkeny Township, District 1, Franklin, Pennsylvania, United States; citing enumeration district (ED) 46, sheet 7A, family 142, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,413.
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