The Return of Sherlock Holmes, including nine cases which Sherlock Holmes goes through, is the collection of short stories in Adventure of Sherlock Holmes. The Adventure of the Empty House is the first case after Sherlock returns and ventures. Since Sherlock Holmes and Professor Moriarty, the Criminals' Leader of London, were falling into the Reichenbach Waterfall, all people thought Sherlock Holmes died. Unexpectedly, eight years later, Sherlock Holmes disguised as old tramp and returned, then made use of his old residence in Berg Street, finally, he worked out three unsolved cases within London. After encountering the death in the Reichenbach Waterfall , Detective Sherlock Holmes was getting old slowly, but never dies.