The Old Nurse's Story by Elizabeth Gaskell

This story hits all the marks of a classic ghost story: an isolated manor, creepy music sounding from a disused organ, ghostly apparitions begging to be let inside. Despite all the hallmarks of a ghost story, the true horror of the story is in the very real, all-too-capable cruelty people and in their inability to right the wrongs of the past, showing readers how ghosts are not the only beings capable of creating terror.