Heigh, ho.
Except as an interesting academic excercise to show how things can properly be done, I'm not even sure why John Rice of Dedham should take up so much curator time. There must be hundreds of other cases where descendants would be a bit grateful for help.
As for Dale, I'd recommend (if I have not already done so) that he takes enough time off to read Hilary Mantel's "Wolf Hall" and "Bring Up the Bodies". Although they are novels, they give me as much insight as any history book an insight into how Tudor society actually worked. They are also genealogically and historically correct, although historians might have different views about motives, psychology, etc of the actors. The important thing is that Dale will have a laugh or two (which will do him good).
I found a genuine immigrant to America yesterday (to Virginia or Maryland, I suppose) from an Engish pedigree. But I suppose he must have died without issue: not many American Champernownes, and since his death was recorded in England, he is unlikely to have had children in America.
It may be idealistic, but biographies are hugely more important if you can fit them into the genealogical framework. What do you make of someone who was born a slave, ran away, was adopted by a native American chief, started a Baptist Church in America, became a slave again, ran away to the British during the American revolution, was evacuated to Nova Scotia on the recognition of American independence, started a Baptist Church there (which became multi-racial), went to Sierra Leone where he was one of the leading citizens, went off to London to protest against their treatment after John Clarkson was replaced as Governor, etc.
Now that was a Man. Contrast him with Zachary Macauley (father of Thomas Babington Macauley) who took over in Sierra Leone, who physically recoiled when he went to a black service when he heard that "God is Love" -no! God is Truth, and Law, and requires your Submission, to Him, of course, and also to Me (and his son's inheritance in India has some of the same characteristics).
Mark