United States Census, 1860, database with images, FamilySearch 1860 Census, Cyrus Hart in entry for Joseph Hart, Jackson Township, Darke County, Ohio, 1860.
Ohio, County Marriages, 1789-2013, database with images, FamilySearch, Cyrus Hart and Elizabeth M. Armstrong, 03 Oct 1861; citing Darke, Ohio, United States, reference item 1 V B-3 P 91 n 183; county courthouses, Ohio; FHL microfilm 1,030,772.
Find A Grave, database and images (https://www.findagrave.com : accessed 07 January 2020), memorial page for Cyrus Hart (25 Apr 1838–14 Sep 1914), Find A Grave Memorial no. 134133105, citing Greenville Union Cemetery, Greenville, Darke County, Ohio, USA ; Maintained by History Hunter (contributor 47998494). Find A Grave: Memorial #134133105
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