I pass this anchor every day at least a few times. It's from the HMS Winchester that went down out here in the late 1690s I think. It's a huge son of a gun. Got up close and took a look today and I think theres some grape shot stuck on the palm of the anchor.....might have to chip it off for the collection.
That anchor is HUGE! Take a picture of the grapeshot, I'd like to see it. I think I have a piece of pre-civil war grapeshot, but I'm not sure how old, or if it even is grapeshot.