Sherlock Holmes and The Devil's Claw

The receipt of a mysterious package, sent to Holmes from Pentonville prison, begins a case that should it not be resolved, our great nation with its proud naval tradition, might founder.
A brilliant naval engineer, Benjamin Stewart, who has been detained for his own protection, contacts Holmes in an ingenious manner, asking for his help. However, before Holmes can take up the case, the man is murdered. In his message to Holmes, Stewart has implicated his brother who resides at an unknown add...