He stood looking after them… as though he had perceived that they had come back accompanied by a ghost a-piece. – Charles Dickens, Little Dorrit

Whatever its origin, a belief in spirits seems to have been common to all the nations of the ancient world who have left us any record of themselves. Ghosts began to walk early, and are walking still, in spite of the shrill cock-crow of wir haben ja aufgeklärt. – James Russell Lowell, “Witchcraft”