"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MXNW-NWS : 22 August 2017), Mary Swan in entry for William Swan, 1880; citing enumeration district ED 53, sheet 712B, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d), roll 0178; FHL microfilm 1,254,178.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MSHF-6NC : accessed 29 April 2019), Mary Thornley in household of John Thornley, Capital Township, Precinct 1-2 Springfield city Ward 2, Sangamon, Illinois, United States; citing enumeration district (ED) 88, sheet 5A, family 101, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,343.
"Illinois, County Marriages, 1810-1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q292-VM8Z : 5 November 2017), John Thornly and Mary E. Swan, 20 Nov 1888; citing , Cass, Illinois, United States, county offices, Illinois; FHL microfilm 1,313,106.
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