The "Dragon", or "Michael" Line passes through the earthen banks and on through Ashbury House. There is a tale that the house was deliberately built on the energy line for the "good masculine energies".
This is an unspoilt and unsung little hillfort - tucked away behind the Ridgeway not far from Waylands Smithy. I walked there once via Weathervane Hill and the sarsen drift field. Don't know about the Dragon Line though ... its proximity to the Ridgeway may have been more significant.