The information I have on hand does not list an Ann as the sister of Charles. I have down as his siblings: Telitha,Jane(Eliza),Emereth, Martin, Melissa,Caroline,Henry,Urbane,Elijah, Charles Oliver,and Salley. I did not do the research but this was given to me is some papers. Hope this helps. Also the parents were Moses G.H. Calk and Nancy Duke. Some say we are heirs to the Duke fortune but I think it has all been squandered. Ha!