Yes, it would be good if you could get up there to get some on-site references and, perhaps, a view on what the stone setting might be.

Oh yes, and some better pictures of the ring cairn than the poxy one I posted.

Do you know why Circles 275 and 278 were thus named. Sounds like they might be numbers from a Royal Commission Inventory in which case we might get a similar name for the stone setting.