It's all that fresh air, it messes with the brain. I don't know yes or no, and all English heritage want to say in their scheduled monument record is "Limited antiquarian investigation of the rectangular structure within the
circle found charcoal, black soil mixed with stone, and a 'dark, unctuous sort of earth' near the bottom of the excavation." Does anyone know if the place has been looked at since, cove or circle? Surely it has, it's such a famous place? Although The Internet seems to think not. But you can't believe what you read on the internet necessarily can you :)