At the end of Alan Moore's graphic novel The League of Extraordinary Gentlemen, this character becomes the leader of British intelligence.
At the end of Alan Moore's graphic novel The League of Extraordinary Gentlemen, this character becomes the leader of British intelligence. This character helped found the Diogenes Club and is described as "heavily built and massive" despite possessing "no ambition and no energy."  Said to be "the most indispensable man in the country," he first appears in The Greek Interpreter and later shows up in The Bruce-Partington Plans. FTP, name this older brother of Sherlock Holmes.
At the end of Alan Moore's graphic novel The League of Extraordinary Gentlemen, this character becomes the leader of British intelligence.
Mycroft Holmes (prompt on Holmes, prompt on M)