"One of the most notorious and bizarre mysteries of the Edwardian age, for readers who loved The Suspicions of Mr. Whicher. At the close of the Victorian era, as now, privacy was power. The extraordinarily wealthy 5th Duke of Portland had a mania for it, hiding in his horsedrawn carriage and creating tunnels between buildings to avoid being seen. So when, in 1897, an elderly widow asked the court to exhume the grave of her late father-in-law, T.C....