Eight large stones sit in a field outside a hut in Scotland. The biggest one is as tall as Norman Haddow’s knee, yet he lifts it with ease and brings it inside the small turf-roofed building. He then goes back outside to collect the remaining rocks, which are ready to return to their stone shrine. No one knows exactly how many there were when the tradition started, but the small boulder selection today comes in all different shapes and sizes. The large one is known as the Cailleach. “The smaller…