Mercy was born in 1766. Mercy Knowles ... She passed away in 1796.
Sources
"Nova Scotia Births and Baptisms, 1702-1896," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XL5G-MMP : 10 February 2018), Obed Willson in entry for Mary Willson, 18 Dec 1786; citing BARRINGTON TWP,SHELBURN,NOVA SCOTIA; FHL microfilm 161,968.
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