There was what looked like a metallic scarab beetle on the low ridge of the stores tent last week. Took it as a good sign then found another crawling about inside a couple of days later. Still alive and have found the pair to the Wogglestone. So I suppose it's now The Wogglestones. First has four deep cup marks, second has a deep narrow groove along one cusp. Both dressed Millstone Grit, on their sides, a hundred and fifty metres apart. They should be large enough to leave discenible socket holes - maybe.