solutions, and in enouncing satisfactory explanations of any doubtful and knotty point. Truth was the passion of his soul; and, added to this, was a love of the positive, and a perception of it, which in the exact sciences led to the most useful results. At the age of sixteen he wrote an "Essay on Conic Sections," which was regarded as a work that would bestow reputation on an accomplished mathematician; so that Descartes, when he saw it, was inclined rather to believe that Pascal, the father, had written it himself, and passed it off as his son's, than that a mere child should have shown himself capable of such strength and accuracy of reasoning. The happy father, however, was innocent of any such deceit; and the boy, proceeding to investigate yet more deeply the science of numbers and proportions, soon gave proof that he was fully capable of having written the work in question. Étienne Pascal was rewarded for all his self-devotion by the genius of his son. His daughters also profited by his care, and became distinguished at once by their mental accomplishments and their personal beauty. A disaster that occurred, which at first disturbed the happiness of the family, tended in the end to establish it, and to bring into greater notice the talents and virtues of the individuals of which it was composed. [Sidenote: 1638. Ætat. 15.] The finances of the government being at a low ebb, through mismanagement and long wars, the minister, cardinal de Richelieu, sought to improve them by diminishing the rate of interest towards the public creditor. Of course this act excited considerable discontent among holders of public stock; riots ensued, and some men, in consequence, were imprisoned in the Bastille. Among these was a friend of Étienne Pascal, who openly and warmly defended him, while he cast considerable blame on several government functionaries, and in particular the chancellor Séguier. This imprudence endangered his own liberty; he heard that he was threatened with arrest, and to avoid it left Paris, and for several months hid himself in Auvergne. He had many friends however among noble patrons of learning, and the duchess d'Aiguillon, in particular, interested herself in his favour. Richelieu, as is well known, was very fond of theatrical representations, and a tragi-comedy by Scuderi, was got up for his amusement. Jaqueline Pascal, then only fourteen years old, was selected to fill one of the parts: she at first refused, saying that the cardinal gave them too little pleasure for her to try to contribute to his; but the duchess saw hopes for the father's recall in the daughter's exertions, and persuaded Jaqueline to undertake the part. She acted charmingly, and at the end of the piece approached the cardinal, and recited some verses written for the occasion, asserting the innocence of her father, and entreating the cessation of his exile. The cardinal delighted, took her in his arms, and kissing her again and