Pritchett-Penn,Spotsylvania, Virginia

Have just returned from Spotsylvania CH, VA.
Saw a will referencing James Pritchett as a son in law married to daughter Mary Penn. I am a gggggrandson of John Pritchett(b.17Aug1783 Spotsylvania) & Mary Polly Todd (b.1781, Pennsylvania). Old family info all indicates that John's father was James Pritchett. A couple of references indicate that his mother is Mary ____? Does anyone have a list of the children of James Pritchett and Mary Penn? Also who were Mary's parents? Seems to me it was a Joseph or John.
Saw in a small book that was an early settlers history of Spotsylvania,County. Red colored book, I believe. Thank you in advance.
Andrew Pritchett (Andy)