Answer:
The bell was a dummy and not even working.
Step-by-step explanation:
The short story "The Adventure of the Speckled Band" is one of Sir Arthur Conan Doyle's Sherlock Holmes series. The story revolves, as usual, around the mysterious case of murder which Sherlock Holmes and Watson tries to solve.
While examining the room where Ju lia Stoner was killed mysteriously, Holmes and Watson noticed that there was a bell attached along the walls which seems normal, as people use it to summon for anything. But the weird part about this particular bell was that it was "a dummy", and "it is not even attached to a wire.[. . .] it is fastened to a hook just above where the little opening for the ventilator is." This means that the bell was just a means for something else other than summoning the housekeeper.