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
The Adventure of the Speckled Band Calcutta, India and was married to Helen's late mother who was a widow living there. Dr. Roylott is the impoverished last survivor of what was a wealthy but violent, ill-tempered and amoral Anglo-Saxon aristocratic family of Surrey, and has already served a jail sentence in the past for killing his Indian butler in a rage. Helen's twin sister had died almost two years earlier, shortly before she was to be married. Helen had heard her sister's dying words, "The speckled band!" but was unable to decode their meaning. Helen herself, troubled by the perplexing death of her sister, is now