Cup and ring marks are often found on ancient British stones, notably those in Northumberland. Why did ancient hands carve these circular marks in stone like this? I like to think that, in the days before pen and paper, people might have been recording stories on rock. I added something similar to my monolith:
You're welcome to pick your way through threads and stitches, but I'd be really grateful if you could be kind enough to refrain from pinning.