In 1906, Sir Arthur Conan Doyle, having lost his first wife, was overcome with grief; even Sherlock Holmes and Dr Watson refused his call. It was only when his secretary, Woodie, presented him with an apparent real-life miscarriage of justice, that he could be roused to action. The case in question was that of George Edalji, a Parsee solicitor, who was imprisoned for writing obscene letters and killing livestock in Great Wyrley, Staffordshire. George needed Arthur's help to clear his name. Howev...