The Adventure of the Greek Interpreter Sherlock Holmes, far from being a one-off in terms of his powers of observation and deductive reasoning, in fact has an elder brother whose skills, or so Holmes claims, outstrip even his own. As a consequence of this, Watson becomes acquainted with the Diogenes Club and his friend's brother, Mycroft. Mycroft, as Watson learns, does not have the energy of his younger brother and as a consequence is incapable of using his great skills for detective work: In spite of his inertia, the elder Holmes has often delivered the correct answer to a problem that Sherlock has brought to him.
Sherlock Holmes: A Game of Shadows vows to defeat him. Moriarty's men attack Watson and Mary on a train to their honeymoon. Holmes, having followed the pair to protect them, throws Mary from the train into a river below where she is rescued by Mycroft. After defeating Moriarty's men, Holmes and Watson travel to Paris to locate Simza. When she is found, Holmes tells Simza that she has been targeted because Rene is working for Moriarty and may have told her about his plans. Simza takes the pair to the headquarters of an anarchist group to which she and Rene had formerly belonged. They learn that