The Adventure of the Greek Interpreter a female pupil of Beeton School who can communicate with animals is kidnapped. She is made to interpret dog's language to find a bone of Neanderthal stolen from a laboratory and taken away by a dog but no clue is found. Holmes decides to solve the case with the help of his elder brother Mycroft and visits him in the Diogenes Club in Dealer house where he lives. Though Holmes is estranged from Mycroft, the brothers and Watson discover the bone and find out that it's Wilson Kemp, a pupil who lives in Dealer house stole it but Mycroft tries
Mycroft Holmes [...] the most indispensable man in the country." He apparently serves as a sort of human computer, as stated in "The Bruce-Partington Plans": Mycroft appears or is mentioned in four stories by Doyle: "The Greek Interpreter", "The Final Problem", "The Empty House" and "The Bruce-Partington Plans". While he does occasionally exert himself in these stories on behalf of his brother, he on the whole remains a sedentary problem-solver, providing solutions based on seemingly no evidence and trusting Sherlock to handle any of the practical details. In fact, Mycroft's own lack of practicality is a severe handicap despite his inductive talents: