↑ Hannibal, Eda Anne and Claude W. Barlow. "Richard, William, and Hugh, Sons of John Briggs of Taunton, Massachusetts", in The New England Historical and Genealogical Register. (Boston: New England Historic Genealogical Society) Vol. 125, p. 201.
Children of Deacon John Briggs and Hannah Rockett: Thankful, d. bef 1756, m. 25 Aug 1739 [{addedcomment|sic, cites marriage record in VRs, which actually say 1737, also child born 1738}} William Bassett. [Note: date of 1756 based on date of father's will naming "my late daughter" Thankful Bassett, but her husband remarried 1747 which provides a better estimate.]
↑Find A Grave memorial with no gravestone image claims birth in 1716, death in 1747, but clearly no basis is given. Neither birth nor death record is found. Assume these are assumed dates.