led to the beginning of this invasion. I mean tell me what the particular drug was, and why you took it, and how it affected you"
"Then you know it began with a drug!" cried the author, with undisguised astonishment.
"I only know from what I observe in you, and in its effect upon myself. You are in a surprising psychical condition. Certain portions of your atmosphere are vibrating at a far greater rate than others. This is the effect of a drug, but of no ordinary drug. Allow me to finish, please. If the higher rate of vibration spreads all over, you will become, of course, permanently cognisant of a much larger world than the one you know normally. If, on the other hand, the rapid portion sinks back to the usual rate, you will lose these occasional increased perceptions you now have."
"You amaze me!" exclaimed the author; "for your words exactly describe what I have been feeling"
"I mention this only in passing, and to give you confidence before you approach the account of your real affliction," continued the doctor. "All perception, as you know, is the result of vibrations; and clairvoyance simply means becoming sensitive to an increased scale of vibrations. The awakening of the inner senses we hear so much about means no more than that. Your partial clairvoyance is easily explained. The only thing that puzzles me is how you managed to procure the drug, for it is not easy to get in pure form, and no adulterated tincture could have given you the terrific impetus I see you have acquired. But, please proceed now and tell me your story in your own way."
