The conversation between human and AI assistant.
Is there any notation of Mycroft or third brother/sister in Arthur Conan Doyle's writings?
That's interesting. Can you tell me more about Mycroft's involvement in the stories?
Certainly. Mycroft first appears in the story "The Adventure of the Greek Interpreter," where he brings a case to his brother and assists him in solving it. He also appears in "The Adventure of the Bruce-Partington Plans" and "The Adventure of the Final Problem." However, his role is mostly limited to providing information and assistance to Sherlock.