It's just a pity that the surface of the rock is quite uneven - have a look at this picture of this broken-up carved stone in Ireland ( http://www.irishmegaliths.org.uk/zKillycluggin1.htm ) and imagine using that as a millstone. I am the only commentator that has seen the stone and the suggestions that it was a millstone are just ridiculous. (Similar to describing a dog as a giraffe). We know the history of the area very well - the local history society - the softback locally-published guides - the estate map - and there has never been a flour mill within at least two miles. "You're as good as your last gig".

But what I really need is a copyright-free image - preferably a Victorian print - of a stone with a carved circle or spiral square on. Two adjoining circles would be ideal.