Suicide is forbidden amongst us by the canon law. But the decretals, which form the jurisprudence of a part of Europe, were unknown to Cato, to Brutus, to Cassius, to the sublime Arria, to the Emperor Otho, to Mark Antony, and the rest of the heroes of true Rome, who preferred a voluntary death to a life which they believed to be ignominious. We, too, kill ourselves, but it is when we have lost our money, or in the very rare excess of foolish passion for an unworthy object. I have known women kill themselves for the most stupid men imaginable. And sometimes we kill ourselves when we are in bad health, which action is a real weakness. Disgust with our own existence, weariness of ourselves is a malady which is likewise a cause of suicide. The remedy is a little exercise, music, hunting, the play, or an agreeable woman. The man who, in a fit of melancholy, kills himself to-day, would have wished to live had he waited a week. I was almost an eye-witness of a suicide which deserves the attention of all cultivators of physical science. A man of a serious profession, of mature age, of regular conduct, without passions, and above indigence, killed himself on Oct. 17, 1769, and left to the town council of the place where he was born, a written apology for his voluntary death, which it was thought proper not to publish lest it should encourage men to quit a life of which so much ill is said. Thus far there is nothing extraordinary; such instances are almost every day to be met with. The astonishing part of the story is this: His brother and his father had each killed himself at the same age. What secret disposition of organs, what sympathy, what concurrence of physical laws, occasions a father and his two sons to perish by their own hands, and by the same kind of death, precisely when they have attained such a year? Is it a disease which unfolds itself successively in the different members of a family--as we often see fathers and children die of smallpox, consumption, or any other complaint? Three or four generations have become deaf or blind, gouty or scorbutic, at a predetermined period. Physical organization, of which moral is the offspring, transmits the same character from father to son through a succession of ages. The Appii were always haughty and inflexible, the Catos always severe. The whole line of the Guises were bold, rash, factious; compounded of the most insolent pride, and the most seductive politeness. From Francis de Guise to him who alone and in silence went and put himself at the head of the people of Naples, they were all, in figure, in courage, and in turn of mind, above ordinary men. I have seen whole length portraits of Francis de Guise, of the Balafré, and of his son: they are all six feet high, with the same features, the same courage and boldness in the forehead, the eye, and the attitude.