As the doctor departed, I noted that the mechanism of the hinges and the lock of the door were so perfect that they gave forth no sound. I was very drowsy and soon retired, but before I went to sleep I practised snapping off and on the light from the switch at the side of my bed. Then I repeated over and over to myself--"I will awake at the first sound of a voice." This thought ingrained in my subconscious mind proved my salvation. I must have been sleeping some hours. I was dreaming of Marguerite. I saw her standing in an open meadow flooded with sunlight; and heard her voice as if from afar. I walked towards her and as the words grew more distinct I knew the voice was not Marguerite's. Then I awoke. I did not stir but lay listening. The voice was speaking monotonously and the words I heard were the words of the protium formulas, the false ones I had given the Chemical Staff. "But these formulas are not correct," purred the voice, "of course, they are not correct. I gave them to the Staff, but they will never know the real ones--Yes, the real ones--What are the real ones? Have I forgotten--? No, I shall never forget. I can repeat them now." Then the voice began again on one of the fake formulas. But when it reached the point where the true formula was different, it paused; evidently the Chemical Staff had found out where the difficulty lay. And so the voice had paused, hoping my sleeping mind would catch up the thread and supply the missing words. But instead my arm shot quickly to the switch. The solicitous Doctor Boehm, flooded with a blaze of light, glared blinkingly as I leaped from the bed. "Oh, I was asleep all right," I said, "but I awoke the instant I heard you speak, just as I had assured myself that I would do before I fell asleep. Now what else have you in your bag of tricks?" "I only came--" began the doctor. "Yes, you only came," I shouted, "and you knew nothing about the work of the Chemical Staff on my formulas. Now see here, doctor, you had your try and you have failed. Your diagnosis of my mental condition is just as much a fraud as the formulas on which the Chemical Staff have been wasting their time--only it is not so clever. I fooled them and you have not fooled me. Waste no more time, but go back and report to His Majesty that your little tricks have failed." "I shall do that," said Boehm. "I feared you from the start; your mind is really an extraordinary one. But where," he said, "did you learn how to guard yourself so well against my methods? They are very secret. My art is not known even to physicians." "It is known to me," I said, "so run along and get your report ready." The doctor shook my hand with an air of profound respect and took his leave. This time I balanced a chair overhanging the edge of a table so that the opening of the door would push it off, and I lay down and slept soundly. ~4~