Barbara, I have two entries:
1) Augusta Chronicle 4 May 1819.....letters waiting at P. O.....Rebecca
Poythress of Waynesborough, Georgia. That's Burke County in between Screven
on the south and Augusta/Richmond County on the North.
2) Wade Prior m. Rebecca Poythress 4 Mar 1829, Columbia County Marriage Book
# A. Columbia County is north of Augusta/Richmond County.
All of the "norths" and "souths" above refer to up and down the
Savannah River so Rebecca traveled a couple of counties to get married.
Unless we can pin Rebecca to George P. she may be difficult to find as Burke
records are next to non-existant. She could be anybody but my guess would be
"b. Burke County" since she would be only 14 years old with a letter waiting
in Burke if she was b. 1805. She didn't participate in any of the Georgia
Land Lotteries and she didn't have a CSA widows pension which would be highly
unlikely given her age anyway.
The citation by a lady named Grass would be most interesting. Can you
contact her? Might be worth a shot. She can't be any more illusive than
our original Mrs. Grass.