'Running parallel to the conventional history of Liverpool ... there is an unseen seam of supernatural stories that have been largely ignored by the strait-laced historians, ' says Torn Slemen, who is, of course, fascinated by this other history and no subject matter is too strange or too terrifying to merit his scrutiny. While some stories may prove to be nothing more than urban myths, many turn out to be only too spine-chillingly true. Take for...