Hi Andy, yeah the stone was in situ but looked the ground around it looked like it had been cleared. It was a kind of a domed shape stone if I can remember correctly, a very light coloured stone. Shame it can't be located, looked very unusual.
OK Ken, but I have to say that I'm not definite that it's not there. There's quite a few nettles and other growth on the mound. I just looked at all the easily accessible stones.