For others who haven't read our offline mail between ourselves, this is a jist for them.
You have a Henry Kempton, b London, a carpenter who came to Hartford, CT (for a small while), then moved to Fairfield, NY (a suburb of modern Utica, NY?).
This double named Henry has caused confusion for many years with people.There is the London carpenter Henry, and there is the Ephraim I descendant U.S. Army Major Henry Kempton in the same Fairfield region.
We can now make sense of this conflation and confusion.Your Henry came to the States pre-/post-1812, where he married in the NY region.