I'm up in Scaawtland at mo and went to visit Corrimony this afternoon. Was rather miffed to find some graffiti on the cup marked stone (thought to have originally capped the chamber)
It seems to be 4 girls names, written right next to one of the cup marks in felt tip or some sort of ink, and the handwriting looks very much like a childs, which begs a lot of questions!

Letting a child loose with felt tips on a prehistoric monument?! It's a new one on me, I must say.

I took a pic and have informed HS, so hopefully it'll get sorted.