I was able to get some history on the anvil from the family
The history of the anvil (that I know and can verify) is that it belonged to my step-grandfather's, grandfather (William Thomas Castles [1869-1969]), then his uncle (William Thomas Castles Jr. [1909-1981]) who never had any children, my step-grandfather (William Evans Byrd [1930-2010]), who brought it down to Lexington from the community of Cornwell in Chester county, South Carolina. The anvil probably didn't see much use after late 40s early 50s. While the Castles family did own a large planation home with about 320+ acres in Cornwell, W.T. Jr. (or Red as he was called) was a career army officer, and later an attorney, judge, author, and outdoorsman, but didn't to much to keep up with the older agrarian lifestyle of the family. While his father was still active I can imagine more than a few horseshoes were struck on that anvil, but it has largely sat in storage for the past 70-80+ years.
pretty cool, I think.