Sherlock Holmes is a fictional detective created by British author Arthur Conan Doyle. Referring to himself as a "consulting detective" in his stories, Holmes is known for his proficiency with observation, deduction, forensic science and logical reasoning that borders on the fantastic, which he employs when investigating cases for a wide variety of clients, including Scotland Yard. [Source]
“Education never ends, Watson. It is a series of lessons, with the greatest for the last". Sir Arthur Conan Doyle, His Last Bow
“Excellent!" I cried. "Elementary," said he.