The Spider

When the student of medicine, Richard Bracquemont, decided to move into
room 7 of the small Hotel in Paris, three persons had already hanged themselves
from the cross-bar of the window in that room on three successive Fridays." The
last of them was a police sergeant who had volunteered to sleep in the room to
learn what happens that might explain the hangings, and somehow he met with the
same fate. The medical student was aware of these incidents, but...