Yes - He had permissionIf you had a bigger piece you could send a sample to be identified. https://www.fpl.fs.fed.us/research/centers/woodanatomy/wood_idfactsheet.php
thanks for the Link!
I disagree with the Oak guesses because I don't see any medullary rays so maybe Chestnut. Whatever is growing in the region now would be a good place to start. - I had the same question about oak -
Did your son have permission to remove the wood from a historic site?
I am hoping to find out more!So basically Keith, you have a seven hundred or more years old piece of wood, that needs to be stabilized. And that could have a very interesting story behind it, I hope you do some research on it to get as much info about it as possible.
Cold you sand the end of that piece and a bit of the side smooth (ideally to 400 grit) and give us pictures ? Would help ID a lot .