Tried to visit this stone while driving on a different ferry route from Le Havre to my Sisters's, and drove to a place to the south where some tracks were marked on the map which would lead to the orchard. However, once we got to the orchard, we found it had been newly and securely fenced, with no way in. Even the view to where the stone should be was obscured by an apple trailer.
Looking at Google, it seems that there is a second fallen menhir to be found nearby, and a third one half a mile to the south. Something for the future.
Something is not right. This message is just to keep things from messing up down the road