Sorry for the delay, but I have been very busy. If you look at the Walker Family Tree, you should be able to see most of what you are looking for, but we still have a problem with Priscilla Thomas, wife of John Tozer (married 19 March 1972) and John Tozer / Melony Grinney - married 21 february 1814. John is recorded as being born in 1794. Most of this info came from IGI which we now do not seem to be able to find again.
We have managed to get back 2 more generations thanks to other people's trees.