Further: if the rocks were used by shamans and not by other members of the community, I wonder whether they were in designated areas, e.g. marked as sacred, entry restricted to spiritual arbiters and their clients. It would be interesting to know if any cup and ring marked stones are within a ring of post holes or even a ring of stones marking the special area. Does anyone know of evidence of this, I.e. archaeological investigations around cup and ring stones that have identified evidence for buried post holes or similar?