This document compares the fictional detectives Sherlock Holmes and Hercule Poirot. It discusses the authors Sir Arthur Conan Doyle and Agatha Christie, as well as influences on their work. Holmes uses deductive reasoning while Poirot uses psychology. Their sidekicks, Dr. Watson and Captain Hastings, serve similar roles but have some differences. The document analyzes similarities and differences in the detectives, sidekicks, stories, and overall tones between the Holmes and Poirot works.