The symbol of four: the greatest case of Sherlock Holmes

Arthur conan doyle's works

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Four signatures, also known as four signatures. It is the second mystery novel written by arthur conan doyle, a British detective novelist, after The Study of Blood Characters, with Sherlock Holmes as the protagonist. The story takes place between 1887 and 1888. It tells the story that Meryl Morstan, a British lady, received an anonymous parcel every year after her father disappeared. This parcel originally involved a conspiracy. This novel objectively exposed and reflected the British colonial activities in India, and it was a great success once it was published. At the same time, the author is also famous for it. In addition, there are many film and television works of the same name.