Hello. I can't seem to identify this Artillery Shell that was removed from the walls of a very old house. A friend of mine said that his father took this out years and years ago, and I think it could be Civil War. It does not have any marks, and is more than 4 inches long and just under 2.5 inches diameter. Brass and Copper over Iron. IT weights about a pound and a half. It doesn't seem to appear on any of the civil war sites. Does anyone have any ideas? Thanks - Ryan