There is an old proverb, that "Fancy is as good for a fool as physic," and I believe the saying might be carried further still; for there is such a thing as corporeal disease, depending entirely upon the mind; and that with very wise men too. The effect of mental remedies we all know, even in very severe and merely muscular diseases. Whether Doctor Parr was cured of his aguish sensations or not, I can not tell; but I have known several instances of mental remedies applied with success; to say nothing of having actually seen the incident displayed by old Bunbury's caricature of a rheumatic man enabled to jump over a high fence by the presence of a mad bull. I will give you one instance of a complete, though temporary cure, performed upon a young lady by what I can only consider mental agency. One of the daughters of a Roman Catholic family, named V----, a very beautiful and interesting girl, had entirely lost the use of her limbs for nearly three years, and was obliged to be fed and tended like a child. Her mind was acute and clear, however, and as at that time the celebrated Prince Hohenloe was performing, by his prayers, some cures which seemed miraculous, her father entered into correspondence with him, to see if any thing could be done for the daughter. The distance of some thousand miles lay between the Prince and the patient; but he undertook to pray and say mass for her on a certain day, and at a certain hour, and directed that mass should also be celebrated in the city where she resided, exactly at the same moment. As the longitude of the two places was very different, a great deal of fuss was made to ascertain the precise time. All this excited her imagination a good deal, and at the hour appointed the whole family went to mass, leaving her alone, and in bed. On their return they found Miss V----, who for years had not been able to stir hand or foot, up, dressed, and in the drawing-room. For the time, she was perfectly cured; but I have been told that she gradually fell back into the same state as before.