The fictional detective created by Sir Arthur Conan Doyle is Sherlock Holmes. First appearing in "A Study in Scarlet" in 1887, Holmes is renowned for his keen observational skills and logical reasoning. He resides at 221B Baker Street in London, where he solves complex cases with the help of his close friend and chronicler, Dr. John Watson. Holmes' character has inspired countless adaptations in literature, film, and television. His iconic deerstalker cap and pipe, along with catchphrases like "Elementary, my dear Watson," have cemented his status as a quintessential detective in popular culture.