From ‘The Witchcraft and Folklore of Dartmoor’ by Ruth E St Leger-Gordon (1965?):
“The circle has.. acquired the reputation of being in some way eerie. I know several people who say that they are unable to ride their horses along the old track that winds right through it. Their mounts become restive and evince such unwillingness to pass inside the circumference that a detour has to be made, and the track regained on the farther side.”