Here's another one of those stones ( http://www.themodernantiquarian.com/post/39939 ). I told nats about them - but he doesn't want to know. They're on the S.M.R. but not the N.U. Rock Art website. I'm the only person that's been to them - a consequence of Northumberland being England's least densely populated county, perhaps - and they await the attentions of the Rock Art photographers. Too boring for them maybe ? Perhaps they're frightened of sheep ?