Hello Richard and a warm welcome to Rootschat
I must say I am thrilled to bits to hear from a fellow Pierce researcher as there don't seem to be many of us around (despite the family's fecundity!).
I've made precisely zero progress on tracing this line further back, though recent releases of apprenticeship records and London land tax records add a bit of colour on our common ancestor George himself.
A summary of my direct line after George (5x g-gf) up to the 20thC is:
(4x g-gf) James Parker PIERCE (1764-1869) married (in England) Mary TIMBRELL
(3x g-gf) John Timbrell PIERCE (1831-1909) married (in England) Mary Jane MILWARD
(2x g-gf) John Timbrell Milward PIERCE (1862-1927) married (in Nebraska, USA) Anne Wylie MACGREGOR
(My g-gm) Mary Winifred PIERCE (1887-1940) married (in Asuncion, Paraguay) Frank MIDDLETON
My direct bit of the line has subsequently ended up back in England, though the American branch of the family is also thriving.
If you add a couple more posts to your name (which you can easily do by responding further to this thread) you will be able to use Rootschat's personal messaging system so that we can exchange family information away from the public boards. I'd very much like to liaise further regarding our overlapping family tree.
Anna