Experts in Fife, Scotland believe a cross carved into the wall of a farm could be "holy graffiti" created by a 13th century pilgrim on his way to the tomb of Saint Margaret. The stone was later used to build the farmer's wall.
Dunfermline tourist guide Roger Pickering found the cross. "I was walking along the route which was once the road from Dunfermline to Glasgow. It was in the evening, the light was just right and it shone on the stone, lighting the cross."