Robert Jeffrey tells the story of the infamous Peterhead Prison in Scotland's far north-east. Built in the 1880s as part of an ambitious humanitarian plan to use convict labour to construct a 'harbour of refuge' on the town's wild, storm-battered coast, it became what some call Scotland's gulag. A cold and brutal place, it has held down some of Scotland's most violent criminals and most infamous prisoners, convicted of the most heinous of crimes.