Rot to Wrupert. He'll do something.

Found a zigzag on one of the stones - didn't even get off the bus ! Needs a side illuminated photograph on a dark night. A tractor headlight maybe. or a huge sheet of brown paper and some soft wax. ( http://membres.lycos.fr/megalithesanjou/menhir/menhir.html ). The northern face, I think; it's very faint ( http://www.themodernantiquarian.com/post/582 ).

The largest stone in a stone row is the one that's likeliest to be decorated - maybe.