The document provides a biography of Sir Arthur Conan Doyle and summarizes the short story "The Man with the Twisted Lip" by Sherlock Holmes. It notes that Doyle was born in Scotland and studied medicine, eventually becoming a successful author. The summary describes how in "The Man with the Twisted Lip", Sherlock Holmes investigates the disappearance of Mr. Saint Clair and ultimately discovers that he had been disguising himself as a beggar to earn more money undercover.