I have a cannonball. It is 4.5 inches in diameter and weighs 10 pounds. It was given to me by a late great uncle who lived in Gaylesville, Alabama. He plowed it up years earlier in his field. He had often told of General Sherman's march through the area and burning his grandparent's crops. Any ideas on the type of cannonball? If it was a Confederate ball, it may well have been cast in Cornwall Furnace in Cedar Bluff, Cherokee County, Alabama. It was knocked out of service in 1864 by General Sherman.