Lord Charles Sheridan and his American wife, Kate, have heard some truly awful things about Britain's most notorious prison. But Dartmoor and its mist-shrouded environs hold special appeal for both Sheridans. Kate hopes to find inspiration for her new Gothic novel, while Charles plans to implement a fingerprinting program at the prison - and arrange a meeting with one of its most infamous inmates, Samuel Spencer. He's convinced that Spencer - a Scotsman who admitted to killing his wife - is, in