The Signalman

Charles Dickens's last great ghost story is also his most personal, inspired by a terrible accident on a train he himself was riding on. He revisited this haunting memory on the figure of a railway signalman, who hears bells ringing in his signal box when no one else does, who sees a figure no one else can see - and who, following those ominous signs, always witnesses horrible incidents. 'I am troubled, sir,' he cries. 'I am troubled!' But what exactly is it that is so troubling the signalman? - And what does it want?