Answer:
Holmes's plan for solving the case will require the detective and Watson to spend the night in the room where Miss Stoner's sister died
What is "the speckled band" in the story?
the pattern on the back of the swamp adder
Explanation:
In Arthur Conan Doyle's "The Speckled Band," Holmes and Watson spend a night hidden in Ms Stoner's sister's room, where she suffered a horrible death. Her sister Helen is supposed to sleep there that night, as Dr Roylott claims that her room is under repair. Thus, Helen fears for her life, since her late sister's room is next to Dr Roylott's and he is afraid to die like her sister.
That night, Holmes and Watson hear a noise coming from the vent, which leads to Dr Roylott's room. Suddenly, in the darkness, Holmes hits something coming through the vent, returns it to Dr Roylott's room and hear him scream and die. Finally, the specked band that Julia had described before she died is a poisonous snake that the doctor used to murder her, and that intended to use it agin to kill Helen.