Maybe it was the sun beating down on my bald patch but I thought I counted 9 stones with 2 still standing proud. Did not realise till I got home that there was another circle to the south east, another reason to go again.
Just 500 metres on from King Arthur's Hall and clearly visible, so unless the visibility is particularly low you shouldn't need to map read. I agreed with Craig Weatherhill's drawing in "Cornovia: Ancient Sites of Cornwall & Scilly" (Cornwall Books - 1985, revised 1997 & 2000) but I also found a few extra stones not reported. I'll try to do a drawing soon.
Sadly destroyed double circle to the east of King Arthur's Hall, just by the dry stone wall. Only one stone remains upright and it is not easy to work out which stones belonged to which circle.