Mary was born about 1820. She passed away after 1880.
Sources
"Rhode Island, Vital records, 1846-1898, 1901-1953," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:4M38-V83Z : 7 November 2019), Isacc Cooper Watson and Mary Ann Bitzenberger, 1840; citing Marriage, Middletown, Newport, Rhode Island, United States, Rhode Island State Archives, Providence; FHL microfilm 007966226.
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