I was recently reading the works of the 17th-century antiquary John Aubrey, who at one point mentions a ghost craze that had broken out in Cirencester. The ‘apparition’ was reported to have disappeared with ‘a curious perfume and most melodious twang’. Reading this I unconsciously got ready for a man as wise as Aubrey to pooh-pooh the whole thing, pouring scorn on such superstition.