Mary was born about 1756. She passed away about 1797. 
Source Information Title Ancestry Family Trees Publisher Online publication - Provo, UT, USA: Ancestry.com. Original data: Family Tree files submitted by Ancestry members.
Title Family Data Collection - Births Author Edmund West, comp. Publisher Ancestry.com Operations Inc
Detail Book Title: The Carr family records : embacing [sic] the record of the first families who settled in America an Edit Source Source Information Title North America, Family Histories, 1500-2000 Author Ancestry.com
Source Information Title U.S., Find A Grave Index, 1600s-Current Author Ancestry.com
Detail Volume: 313 Edit Source Source Information Title U.S., Sons of the American Revolution Membership Applications, 1889-1970
Title Virginia, Marriages, 1660-1800 Author Dodd, Jordan Publisher Ancestry.com Operations Inc
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