"Rhode Island Marriages, 1724-1916," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F8K2-6Q3 : 6 December 2014), William Card and Mercy Briggs, 13 Jun 1733; citing East Greenwich,Kent,Rhode Island, reference ; FHL microfilm 908,269.
The Church of Jesus Christ of Latter-day Saints, "Pedigree Resource File," database, FamilySearch (https://familysearch.org/ark:/61903/2:2:348P-GMK : accessed 2017-09-11), entry for Mercy /Briggs/.
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DNA Connections
It may be possible to confirm family relationships with Mercy by comparing test results with other carriers of her mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Mercy:
Briggs-5927 and Briggs-2121 appear to represent the same person because: Thease look to be the same person. but briggs - 5927 don't have a lot of info and sould be merged into briggs - 2121 as they are married to the same person.
Briggs-5927 and Briggs-2121 are not ready to be merged because: These look to be the same person and Briggs-5927 bearly have any info at all and should be merged into Briggs-2121