According to Jacobus and Waterman (Hale, House and Related Families, p. 506), Thomas Cooper, son of Thomas and grandson of the first Thomas, married at Middletown (CT), 26 Jan 1709/10, Abigail Wetmore (Whitmore), born at Middletown, 6 November 1678, . . . daughter of Thomas and Katharine (-----) (Roberts) (Leeke) Wetmore.
According to Savage (Genealogical Dictionary, Vol. IV., p. 528), Thomas and Catherine Wetmore (Whitmore), of Middletown, did have a daughter Abigail born 6 November 1678.
Also according to Savage, on p. 526 of Vol. IV, Francis Wetmore(Whitmore) and his wife, Hannah Harris, also of Middletown, had a daughter Abigail born 23 January 1681.
According to "Families of Early Guilford, Ct.", Vol. I., p. 78. Samuel Bishop of Guilford married, 20 April 1697, "Abigail Whitmoor" (later corrected in the errata to "Abigail Wetmore of Middletown." This entry provides no clue as to which Abigail is Samuel's wife.
In the "Hale House" write-up, it is mentioned that three of the Cooper sons selected, as their guardian, after Thomas's death in 1733, their "uncle Francis Wetmore". Abigail, daugher of Thomas and Katherine had no sibling named Francis. Abigail, daughter of Francis and Hannah, had a brother Francis, born 25 November 1675 (again, according to Savage).
As you may know, the late Donald Lines Jacobus was the genealogist's genealogist, but the above leads me to suspect that he and Waterman got it wrong and that Abigail, daughter of Francis and Hannah, is the Wetmore that married Thomas Cooper, while Abigail, daughter of Thomas and Katherine is the one who married Samuel Bishop. Note that Cooper died in 1733 and Bishop in 1753, and there is overlap in the birth dates of the two sets of children, so it would seem to be impossible that both were married to the same woman.
Has anyone out there got more and better information on this question?