IN WHICH THE AUTHOR OF THIS SINGULAR WORK INFORMS THE READER HOW HE ACQUIRED THE CERTAINTY THAT THE OPERA GHOST REALLY EXISTED The Opera ghost really existed. He was not, as was long believed, a creature of the imagination of the artists, the superstition of the managers, or a product of the absurd and impressionable brains of the young ladies of the ballet, their mothers, the box-keepers, the cloak-room attendants or the concierge. Yes, he existed in flesh and blood, although he assumed the complete appearance of a real phantom; that is to say, of a spectral shade. When I began to ransack the archives of the National Academy of Music I was at once struck by the surprising coincidences between the phenomena ascribed to the "ghost" and the most extraordinary and fantastic tragedy that ever excited the Paris upper classes; and I soon conceived the idea that this tragedy might reasonably be explained by the phenomena in question.