The image of an unidentified man dressed in black is said to be seen standing just outside the stone circle after dark. According to legend, the 9 stones are witches caught dancing on the Sabbath to the sounds of the Devil’s fiddle playing. In this view,the man in black could be the Devil admiring his handiwork. It is also said that when the moon is full, the stones move around in a ritual dance.
chris-moss.net/homesweethome/ancientbritain.html
TRIBE website
That's the PDNP warden for the area, sneaky bugger he is. ; p
I figured as much :)