Thanks Gary,
I agree - we always thought it strange we had only two children to John, and then another researcher found two more (thanks Pat). The gaps between children certainly leave room for more.
The fact that William BARRETT, convicted and transported with Shadrach HOWARD, turns up as an executor for Fredrick HOWARD's will seems to be more than coincidence.
Frederick is in Kensington, William in Reed Beds. They would not normally cross paths.