For seven weeks in late spring and early summer of 1628, a ghost haunted the modest dwelling of Huguette Roy and her husband in the small city of Dole in the Holy Roman Empire near the French border. Before and after giving birth to her third child, Huguette received visits twice daily from a young woman clothed in white who cleaned her house, eased her pains, and tended her newborn son. Only Huguette could see this apparition, and the haunting...