GIBBS, Joseph of Framingham, and Mercy Clark, July 1, 1712.
Source:Barry, William. History of Framingham, Massachusetts, p. 254 reports the marriage date as 1 Jul 1722, which makes it sounds like Joseph had two wives, based on the birth dates of the children. Clearly the 1722 date is a typo, making Mercy clearly the mother of all his children.