front, and vanishing in the distance, shut off the beyond. [Illustration: "FAR AS THE EYE COULD REACH THE GLASSY BARRIER SPREAD AS A CRYSTAL MIRROR."] INTERLUDE.--THE STORY AGAIN INTERRUPTED. CHAPTER XXII. MY UNBIDDEN GUEST DEPARTS. Once more I must presume to interrupt this narrative, and call back the reader's thoughts from those mysterious caverns through which we have been tracing the rapid footsteps of the man who was abducted, and his uncouth pilot of the lower realms. Let us now see and hear what took place in my room, in Cincinnati, just after my visitor, known to us as The-Man-Who-Did-It, had finished reading to me, Lewellyn Drury, the custodian of this manuscript, the curious chapter relating how the underground explorers lost weight as they descended in the hollows of the earth. My French clock struck twelve of its clear silvery notes before the gray-bearded reader finished his stint for the occasion, and folded his manuscript preparatory to placing it within his bosom. "It is past midnight," he said, "and it is time for me to depart; but I will come to you again within a year. "Meanwhile, during my absence, search the records, question authorities, and note such objections as rise therefrom concerning the statements I have made. Establish or disprove historically, or scientifically, any portion of the life history that I have given, and when I return I will hear what you have to say, and meet your argument. If there is a doubt concerning the authenticity of any part of the history, investigate; but make no mention to others of the details of our meetings."