Hi Leonard - I am also trying to find more about the elusive Berry Mullis. I do have a little more information. Berry and Rebecca had another son after Elbert. He was John Tillman Mullis, also known as J.T. He was my g-great grandfather. I have found no further record of Rebecca but I suspect she died because Berry married a second time to Martha Weekly in Laurens County. They had a daughter, Mary, I believe was her name. I have found no further record of Berry. Interestingly, it appears that Elbert and John Tillman were raised by Joel Mullis, who I believe was their uncle but I can not confirm it. You state that Berry was a son of William and Nancy. Do you have confirmation of that? I suspect that is true but I have not been able to confirm it. By the way, we do know what happened to Elbert. He died in a jail fire.