Hi Vicster,
Regarding the cup-marks you questioned. I haven't seen those before, so thanks for drawing my attention to them. I must pop into the next field soon. Did you notice the other ones on the big slab by the road?
http://www.themodernantiquarian.com/site/1677/copt_howe.html
If so, what did you think (or anyone else who was there, like Jane or Moth) - genuine RA, or natural?
Regards,
TE.