"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M4HD-NYS : 12 April 2016), Martha Morrison in household of James Morrison, McKean, Erie, Pennsylvania, United States; citing family 162, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MN9H-1VP : 12 April 2016), Martha Morrison in household of James S Morrison, Wisconsin, United States; citing p. 67, family 514, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 553,209.
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