"The Adventure of the Speckled Band" is one of the 56 short Sherlock Holmes stories written by Scottish author Sir Arthur Conan Doyle. It is the eighth of the twelve stories collected in The Adventures of Sherlock Holmes. It is one of four Sherlock Holmes stories that can be classified as a locked room mystery. The story was first published in Strand Magazine in February 1892, with illustrations by Sidney Paget. It was published under the different title "The Spotted Band" in New York World in August 1905. Doyle later revealed that he thought this was his best Holmes story.
Conan Doyle was a fervent advocate of justice and personally investigated two closed cases, which led to two men being exonerated of the crimes of which they were accused. The first case, in 1906, involved a shy half-British, half-Indian lawyer named George Edalji who had allegedly penned threatening letters and mutilated animals. Police were set on Edalji's conviction, even though the mutilations continued after their suspect was jailed.
The second case, that of Oscar Slater, a German Jew and gambling-den operator convicted of bludgeoning an 82-year-old woman in Glasgow in 1908, excited Conan Doyle's curiosity because of inconsistencies in the prosecution case and a general sense that Slater was not guilty. He ended up paying most of the costs for Slater's successful appeal in 1928.
Sir Arthur Ignatius Conan Doyle was a Scottish physician and writer, most noted for his stories about the detective Sherlock Holmes, generally considered a milestone in the field of crime fiction, and for the adventures of Professor Challenger. He was a prolific writer whose other works include science fiction stories, plays, romances, poetry, non-fiction and historical novels.
Conan Doyle was friends for a time with Harry Houdini, the American magician who himself became a prominent opponent of the Spiritualist movement in the 1920s following the death of his beloved mother. Although Houdini insisted that Spiritualist mediums employed trickery (and consistently exposed them as frauds), Conan Doyle became convinced that Houdini himself possessed supernatural powers—a view expressed in Conan Doyle's The Edge of the Unknown. Houdini was apparently unable to convince Conan Doyle that his feats were simply illusions, leading to a bitter public falling out between the two.