"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MWS4-D2H : 14 August 2017), Mary Osborne in entry for Stephen Osborne, 1880; citing enumeration district ED 82, sheet 54D, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d), roll 0580; FHL microfilm 1,254,580.
"Michigan Marriages, 1868-1925," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:NQS5-SK8 : 4 December 2014), Lyman Close in entry for Arthur L. Close and Mary Osborn, 28 Oct 1891; citing Hillsdale, Hillsdale, Michigan, v 2 p 124 rn 1175, Department of Vital Records, Lansing; FHL microfilm 2,342,490.
Find A Grave, database and images (https://www.findagrave.com : accessed 08 June 2019), memorial page for Mary L Close (4 Sep 1868–23 Dec 1955), Find A Grave: Memorial #195597766, citing Oak Grove Cemetery, Hillsdale, Hillsdale County, Michigan, USA ; Maintained by Jeff Lawrence (contributor 48895224). (includes photo of gravestone, common with parents and son, but no dates)
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