Spartanburg has a great library.  I made copies of several pages that may contain information related to these Fosters.

One new fact DID emerge.  After moving to Tennessee, Jared (Jarrett) Foster (thats the son of John Foster and the father of Andrew J.)  fought in the Cherokee War.

He is listed as Private Jarret Foster, Elliott’s Company – Lauderdale’s Battalion, Tennessee Mounted Infantry.  THAT is going to be fun to research further.