Calvin was born in 1777. He passed away in 1850.
1) Find A Grave, database and images (https://www.findagrave.com : accessed 22 February 2020), memorial page for Pvt Calvin Halladay (14 Sep 1777–12 Nov 1852), Find A Grave Memorial no. 9318843, citing Harmon Halladay Cemetery, Bedford, Calhoun County, Michigan, USA ; Maintained by Graveaddiction (contributor 46528400) .
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