You ask for the source. Well, I've studied this my whole life. The first source I can recall was a series of old articles called "Leaves from the Family Tree" printed in the Chattanooga Free Press, I think, might have been Chattanooga Times. Now days the paper is combined, Chattanooga Times Free Press. The author and researcher was Margaret Roberson Hollinshead. I knew her daughter, also named Margaret, and remember her telling many family stories about family history. She passed away sometime in the 1980's. I also have a digital copy of the farm ledger and family page from Maj. James Monroe Roberson's family Bible. The Bible has names, birth dates, marriages, slave names, etc. I know where Col. Issac is buried and also where Maj. James is buried. William, Maj. James' father, is buried in the same cemetery with his son, Maj. James. Col. Issac is buried in a different graveyard located about 2 or 3 miles away. My guess is that the Jim Cooper connection may come through the Cocke family in Franklin Tn. A daughter of Maj. James, can't recall the name, married a Cocke from Franklin. Sorry for rambling on so.