All is an absolute and complete blank. In short, ten years, the most important ten years of a man's life, have been wiped out of mine. Am I insane?" "Not in the ordinary sense," I replied; "but there is no doubt that something has gone wrong with a certain portion of your brain." Mainwaring sank into a chair while I was speaking; now he sprang up and walked across the room. "Merciful heavens!" he exclaimed, turning abruptly and facing me. "Then it is true. What reason is left to me almost reels before the astounding fact. It is absolutely true that my youth is over. As far as I am aware I never spent it. I never used it, but it is gone. I have a wife whom I do not love. I have children whom I care nothing whatever about. I have a profession about which I know nothing. I cannot give legal advice. I cannot accept briefs. [Illustration: "MAINWARING SANK INTO A CHAIR."] "My father tells me that I am a married man and a barrister. You tell me the same. I am bound to believe you both. I do believe you. All that you say is doubtless true. I am surely in the most horrible position that man ever found himself in. I am a husband, a father, a professional man. I do not remember my wife. I should not recognise my own children; and what is perhaps worst of all, from a practical point of view, I have completely lost all knowledge of my profession--I cannot therefore earn a single penny for the support of my family. I have come here to-day, Dr. Halifax, to ask you if anything can be done _to give me back my ten years_! Can you do anything for my relief? I am willing to undergo any risk. I am willing to submit to any suffering which can give me back the time that has slipped into oblivion." "I must think carefully over your case," I said. "I need not say that it is of the deepest interest. I cannot tell you how glad I am that you have come to me as you have done. If you had chosen to doubt your father's word, it would have been absolutely impossible for me to have helped you. As it is----" "I live by faith, as I said just now," repeated Mainwaring. "What is your thought with regard to my condition?" "Your condition is strange indeed," I replied. "I cannot explain it better than by comparing the brain to the cylinder of a phonograph. The nerve cells, which can be counted by thousands of millions, represent the cylinder. When certain sensations are conveyed to these cells they are imprinted on them like the impressions made by the needle on the cylinder of the phonograph. Even years afterwards the same series of events or sounds are thus reproduced. _You have lost your cylinder for ten years._ What I have to do is to try by some means to give it back to you again. But before I say anything further, let me ask you a question or two. You say you feel like a young man of twenty-three about to enjoy a well-earned holiday. This is equivalent to announcing the fact that you feel in perfect health."