More likel an old "banker mason"/stone carver who was trying something out before wasting a piece that was already cut out of the quarry. Circular objects, especially if they aren't the length of the object are difficult to carve sucessfully
I still take tools to the beach. Driftwood isn't only for burning.
Edit: In the last dozen years it's gotten harder: about 1/3 of the people out there think a pull saw is a weapon of mass destruction, and about half the rest think carving up a piece of driftwood is an environmental crime. Seriously, I've had some bizarre conversations with park police officers, along the lines of "why are you trying to hurt that log?"
Seems like an appropriate thread to ask, "Have any of you guys ever used pins and feathers to split a rock?"
Helped my father in law split a pretty sizeable rock in his back yard to start finishing a retaining wall he's been working on for a few decades. It was awesome! Sure enough, you just wedge those little guys in there and it splits exactly where you drilled the holes. Remarkable. I don't know what I was expecting to happen, but I was blown away when it worked just like he wanted it to.
There are other ways to split stone as well. If you drive in wooden wedges and completely fill the hole, you can put o hose on the wood and the swelling wedges will split the stone. But it takes a long time. If you live in a cold climate you can also drill holes and fill with water, cap them and go away until spring.
Checkout stonecutters blog quite a few months ago now, he showed a japanese method that was pretty wild.
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