The Speckled Band is Arthur Conan Doyle's own stage adaptation of one of his most famous Sherlock Holmes short stories, first produced in 1910. This thriller in two acts brings to life the sinister tale of a young woman terrorized by an unknown menace in an old dark manor. Holmes and Watson, invited to Stoke Moran Manor to investigate, confront the nefarious Dr. Grimesby Rylott (renamed from Roylott) – a snarling villain who keeps strange company (including a dangerous swamp adder, "the speckled band"). The play intensifies the action of the original story: adding physical confrontations, a more prominent role for the vivacious heroine Violet Stonor (Julia Stoner in prose), and a climactic on-stage showdown where the deadly serpent strikes. Doyle's adaptation cleverly uses lighting and sound effects – such as whistle calls and sudden darkness – to build suspense. The Speckled Band was a popular success on stage, praised for delivering genuine chills. It remains a prime example of Edwardian theatrical mystery, with Holmes's deductive genius pitted against a gothic atmosphere of creeping dread, all resolved with a dramatic flourish as the truth slithers into view.