According to the private journal of Elder Peleg Burroughs of Tiverton, a Minister of the Gospel, "on the 8th day of September A. D. 1780 -- Preached at B. Hambly's upon Psalm 107:31 (O that men would praise xc) married John Manchester to M.F. and stayed all night at Bro. Davenports."
Benjamin Hambly's wife was Elizabeth Fish, probably related to Mary (needs more research).
In the 1850 Federal Census, Isaac is 50 and his (second) wife Mary is 53. They are living at Tiverton, RI. Two children are in the household: Isaac 15 and Mary 10. Also with them is Mary Pearce aged 96 (possibly Isaac's mother-in-law), and 7 other individuals.
The family is still at Tiverton in 1860: John 60, Mary 64, Isaac C. 25, and Mary P. 20.
In 1870, Isaac and Mary, ages 70 & 74, are still at Tiverton. With them are Levi and Amy A. Manchester and their three children, as well as two other individuals.
I have included Isaac in this family group for three reasons: his death record identifies his parents as John & Mary; William named a son Isaac; and, Glenn Russell's family tree at Rootsweb's Worldconnect lists Isaac here.
Additionally, John Redfern's research shows that Isaac and Freelove are brother and sister, as they are buried near each other. Also, they both became church members on 22 Oct 1820 at Tiverton (see James N. Arnold's published church records).