The most melancholy record of the miseries of hypochondriacism is to be found in the diary of Dr. Walderstein of Gottingen. He was a man much deformed in person, and his mind seemed as distorted as his body. Although of deep learning and research, and convinced of the absurdity of his impressions, yet he was unable to resist their baneful influence. "My misfortune," says the doctor, "is, that I never exist in this world, but rather in possible combinations created by my imagination to my conscience. They occupy a large portion of my time, and my reason has not the power to banish them. My malady, in fact, is the faculty of extracting poison from every circumstance in life; so much so that I often felt the most wretched being because I had not been able to sneeze three times together. One night when I was in bed I felt a sudden fear of fire, and gradually became as much oppressed by imaginary heat as though my room were in flames. While in this situation, a fire-bell in the neighbourhood sounded, and added to my intense sufferings. I do not blush at what might be called my superstition any more than I should blush in acknowledging that my senses inform me that the earth does not move. My error forms the _body_ of my judgment, and I thank God that he has given it a _soul_ capable of correcting it. When I have been perfectly free from pain, as is not unfrequently the case when I am in bed, my sense of this happiness has brought tears of gratitude in my eyes. I once dreamt," adds Walderstein, "that I was condemned to be burnt alive. I was very calm, and reasoned coolly during the execution of my sentence. 'Now,' I said to myself, 'I am burning, but not yet burnt; and by-and-by I shall be reduced to a cinder.' This was all I thought, and I did nothing but think. When, upon awaking, I reflected upon my dream, I was by no means pleased with it, for I was afraid I should become _all thought and no feeling_." It is strange that this fear of thought, assuming a corporeal form in deep affliction, had occurred to our poet Rowe, when he exclaims in the Fair Penitent, "_Turn not to thought my brain_." "What is very distressing," continues the unfortunate narrator, "is, that when I am ill I can think nothing, feel nothing, without bringing it home to myself. It seems to me that the whole world is a mere machine, expressly formed to make me feel my sufferings in every possible manner." What a fearful avowal from a reflecting and intelligent man! Does it not illustrate Rousseau's definition of reason--_the knowledge of our folly_.