Mycroft plays an important role in The Adventure of the Greek Interpreter. We find that Sherloc visits his brother Mycroft to help solve a mystery. Sherloc discusses with Watson how his brother has greater powers of deduction but because of his lack of energy, is an armchair reasoner and simply does not have the evidence to prove his conclusions. Sherloc admits to his older brothers greater gift of reasoning and is, from time to time, grateful for the help Mycroft offers on the most difficult cases.