He had never been interested in stories at any age, and had never quite understood the basic concept. He'd never read a work of fiction all the way through. He did remember, as a small boy, being really annoyed at the depiction of Hickory Dickory Dock in a rag book of nursery rhymes because the clock in the drawing was completely wrong for the period.
Terry PratchettProbably the last man who knew how it worked had been tortured to death years before. Or as soon as it was installed. Killing the creator was a traditional method of patent-protection.
Terry Pratchett