"hardly a surface where someone hasn't just scratched their names in with a piece of slate, barely cutting the rock but scratching away moss, dirt, etc. This is all around the walls"
It does'nt sound like a place of peace and tranquillity, people busily scratching their names on all the surfaces.
There is (according to another site!) a labryinth cut on a stone by the mill at Rocky valley, in fact two carvings, but they look a little suspect - very well defined...