"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZ9D-VLJ : accessed 8 July 2015), Lotta Knowles in household of William Knowles, Lexington, Le Sueur, Minnesota, United States; citing enumeration district 123, sheet 289B, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0625; FHL microfilm 1,254,625.
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