Sherri, After I posted the message this morning I found an old posting about the children of Joseph Adcock and Mary Christian.
Someone had what they have found as the children of these two and they also had a daughter Amanda.Joel named his oldest daughter Manda.I realize everyone seemed to use the same names over and over again, I just think it's interesting he had a Joseph, Thomas & Manda.
I also found a posting dated 1998 talking about John A. Adcock from Buckingham Co, VA.It says he moved to Robertson Co., TN in 1822 and possibly was wed to Sally Wheeler in 1787.Have you seen anything on this union and who their children were?
Just one more avenue to check out.I know you've been looking a lot longer and have possibly already checked this out.
In any event I'm pretty sure we're related since it looks like Joel and Elizabeth were brother and sister.