I have a copy of the book mentioned and am still very interested in this family.

My wife is a direct descendant of William Stephens and Sarah Pearce (of Clearwell) via their son Matthew who immigrated to Australia.

see:

http://graememoad.com/web/William_Stephens/William_Stephens.html

Their daughter Elizabeth married David Lazarus Watts

http://graememoad.com/Family4/PS61/PS61_490.HTM

Graeme