If you'd like a gazetteer Moss, drop me a line at fitzcoraldo at hotmail dot com.

Found three sites to date on the portal, l as a capstone, l probable capstone, and l near to the Cerrig y Gof chambered tomb. Which shows presumably that they were reused at a later date as stones of special significance - also these cupmarked stones are fairly close to each other, which maybe means that cupmarking people moved down from the north.....
thanks for the information.