In the suggested short stories by Arthur Conan Doyle (1859—1930), Sherlock Holmes once again demonstrates his unique power of observation and detective talent. Thanks to his shrewd mind and artifice, he solves a crime with the help of a scrap of paper found in the murderer’s hand (The Reigate Squires), cracks quite a delicate case where diplomatic interests of a country are at stake (The Naval Treaty), investigates mysterious cases related to retribution for the past sins (The Crooked Man, The Resident Patient). Finally, Holmes faces a worthy opponent — the smartest criminal of the XIX century. What will this encounter result in?