I read with great interest your reply in 2008 to Ramona at the Polly Family Gen. Forum.
You have William Polley's second wife Abigail Cushman, as the daughter of William Cushman and Sarah Holoway. I'm a direct descendant of their son William Dennis Polley.
I have done no original research on William's ancestors and have relied entirely on the Internet, where I seem to find two possibilities for Abigail, that either she is the daughter of William and Sarah, or, that she is the daughter of Solomon Cushman and Abigail Holmes Bourne. I wonder if you can elaborate on why you believe the parents are William and Sarah.
According to what I've found, William Polley married Abigail Cushman Jan. 17, 1771 at Hebron. The Connecticut Town Marriage Records (Barbour Collection) state: CUSHMAN, Abigail, m. William POLLEY, b. of Hebron, Jan. 17, 1771. I take it "b" means "both" of Hebron. But it appears that Abigail, daughter of William and Sarah, was born at Plympton, not Hebron.
The case for Abigail being the daughter of Solomon and Abigail Holmes Bourne is tenuous. Solomon is the son of Benjamin Cushman (b. March 1, 1690, Plymouth, Mass) and Sarah Eaton (b. Oct. 20, 1695.) Abigail Holmes is the daughter of John Holmes (b. May 28, 1678, Duxbury, Mass) and Susanna Randall (b. Nov. 15, 1687, Scituate, Mass.)
After the marriage of Solomon Cushman and Abigail Holmes, they resided at Grandy or Simsbury, Conn., thus placing them in the state, and reportedly had three children. Two of them are Jerusha, b. 1756, and Eleazur, b. 1758. From what I can find, Eleazur was born at Hebron, Conn. So it's likely the third child was as well, and that she might be Abigail. I can find no further information for this supposition.
So, I'm hoping you might be able to clear up this relationship.