Note 3
Chapter XX · In the Cellars of the Opera

Like the Persian, I can give no further explanation touching the apparition of this shade. Whereas, in this historic narrative, everything else will be normally explained, however abnormal the course of events may seem, I can not give the reader expressly to understand what the Persian meant by the words, "It is some one much worse than that!" The reader must try to guess for himself, for I promised M. Pedro Gailhard, the former manager of the Opera, to keep his secret regarding the extremely interesting and useful personality of the wandering, cloaked shade which, while condemning itself to live in the cellars of the Opera, rendered such immense services to those who, on gala evenings, for instance, venture to stray away from the stage. I am speaking of state services; and, upon my word of honor, I can say no more.