The Adventure of the Speckled Band that of Dr Roylott. Holmes and Watson arrange to spend the night in Helen's room. In darkness they wait; suddenly, a slight metallic noise and a dim light through the ventilator prompt Holmes to action. Quickly lighting a candle, he discovers on the bell cord the "speckled band"—a venomous snake. He strikes the snake with a stick, driving it back through the ventilator. Agitated, it attacks Roylott, who had been waiting for it to return after killing Helen. Holmes identifies the snake as a "swamp adder" and reveals to Watson the motive: the late wife's will had provided an annual
Short story the expected length of "one sitting" may now be briefer than it was in Poe's era. Short stories have no set length. In terms of word count there is no official demarcation between an anecdote, a short story, and a novel. Rather, the form's parameters are given by the rhetorical and practical context in which a given story is produced and considered, so that what constitutes a short story may differ between genres, countries, eras, and commentators. Like the novel, the short story's predominant shape reflects the demands of the available markets for publication, and the evolution of the form