Birth date varies from census to census from 1819 to 1825.
US Census 1870 finds the Michael Cassidy household living in Corning, New York.
"United States Census, 1860," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MC4N-L4K : accessed 20 Jul 2014), Michel Cassady, Town Of Corning, Steuben, New York, United States; citing "1860 U.S. Federal Census - Population," Fold3.com; p. 66, household ID 502, NARA microfilm publication M653; FHL microfilm 803863.
"United States Census, 1870," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M8KX-PJF : accessed 20 Jul 2014), Michael Cassidy, New York, United States; citing p. 95, family 796, NARA microfilm publication M593, FHL microfilm 000552594.
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