Alan, According to "Records of Effingham Co Ga, 1976, George Galpin Nowlan was the sole heir of William Lister Hall. Here is the information from the book:
1803, July 29 - Will of William Lister Hall. All to George Galpin Nowlan. Ex: Wm J Spencer of Savannah Ga. Will recorded in Suffolk Co, NY. Nicol Floyd, surrogate. wit: Moses Clark, William J Bryson, John N Fordham (Sagg Harbor).
I am interested in William Lister Hall. Do you have any information about him? Thanks for any help.