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.
Gentleman detective gentleman than Holmes, yet has no social reservations about beginning his long association with the detective. In the best traditions of the gentry, Holmes proves to be physically brave, and competent with fists, sword and pistol. Like the earlier Dupin and the later Lord Peter Wimsey (see below), Holmes is also a competent cryptanalyst (for instance, The Dancing Men, 1903). Conan Doyle never gave much background about Holmes' family, but his hero was apparently born in 1854 (estimated from His Last Bow, 1917). He also has an eccentric older brother, Mycroft Holmes, a senior public servant and member of the