Marcus Salter, head of Genesis Properties, estimates that the small colony of fairies believed to live beneath a rock in St Fillans, Perthshire, has cost him £15,000. His first notice of the residential sensibilities of the netherworld came as his diggers moved on to a site on the outskirts of the village, which crowns the easterly shore of Loch Earn. He said: “A neighbour came over shouting, ‘Don’t move that rock. You’ll kill the fairies’.” The rock protruded from the centre of a gently shelving field, edged by the steep slopes of Dundurn mountain, where in the sixth century the Celtic missionary St Fillan set up camp and attempted to convert the Picts from the pagan darkness of superstition.