Wish you'd have put this on a few days ago Fitz. I'd have pilfered it for a talk I did in Grassington yesterday:) Ingleborough Archaeology Group recording this and 4 or 5 in the area several years ago.
Not a new find George, there's a few carved rocks in the area, probably more to be found judging by the amount of gritstone boulders that are laying about. Nice to see RA turning up in limestone country though.
I looked in on this one yesterday on the way up the hill but didn't have time to seek out the other two.