Education carried on upon mistaken principles has also been known to prepare the way to insanity, and La Bruyere has justly observed, that there are parents, the study of whose life appears to have been, their giving their children just reason not to regret their loss. Pinel has given us the interesting history of two orphan brothers, who had been brought up in a most anomalous manner--with extreme kindness and effeminacy by a nurse, and with much harshness and injustice by a tutor. The result of this erroneous management was a deficient development in their intellectual faculties, and a debilitated frame, which gradually led to a state of imbecility. When examined by Pinel at the age of twenty and twenty-two, their conversation was puerile in the extreme, and they both displayed a taste for infantile sports and pastimes, befitting children of three or four years old. They sought to express themselves with great volubility, but their language, consisting chiefly of broken syllables, was scarcely intelligible. Notwithstanding their apathic appearance, by a sort of automatic habit, every evening brought on an absurd scene of sentimentality. They would join each other in earnest conversation in a corner of the room; and, with bitter tears and deep sighs, bewail the loss of their parents, who had thus left them in a helpless orphan condition, in their tender years, expressing the sincerest affection for their nurse, but speaking of their tutor with bitter imprecations. A great partiality shown to one sister has driven another one to a state of dementia, that arose from her continually dwelling on the wrongs she experienced, which, of course, were exaggerated by jealousy. External agents producing sudden terror have been frequently known to bring on insanity. It is related of a child of three years of age, who was so terrified on being brought into a madhouse, that he was subject to horrible dreams and visions until his seventeenth year, when he became a perfect lunatic. Women frightened during pregnancy have often become alienated; and there are two cases reported of young ladies who were found insane the day after their nuptials. While disappointments and misfortunes are often the origin of insanity, a sudden melioration in circumstances, and unexpected pleasing intelligence have been also known to derange the intellects. A man who came into the possession of a large fortune, after having lived for many years in penury, was so alarmed at the thought of losing this property, that the apprehension of the evil deprived him of his senses. An instance is recorded of a young girl, long separated from her lover by parents averse to their union, who became insane immediately after her marriage.