They did say that one of them had it's north arm pointing directly at a large piece of decorated bedrock, which was covered in cupmarks, at least one of which had three rings, 'about the size of a dinner plate'.

They also mentioned that it had had some of its surface removed and re-carved. (this latter factoid might have been refering to a different place though)

They all seem to be quite close to each other from the way they were talking about them.

And one of them has two cupmarked stones in its north arm, so Stan'd know where they are I reckon :-)