The younger sister, Jacqueline, has been made a special study by M. Cousin amongst the ‘Illustrious Women of the Seventeenth Century.’ She was beautiful as her sister, and a child of genius like her brother. She began to compose verses at the age of eight, and in her eleventh year assisted in the composition and the acting of a comedy in five acts, which was a subject of universal talk in Paris. Her powers, both as an actor and a verse-maker, made a wonderful reputation at the time, which, as we shall see, was highly serviceable to her after. Her verses, it must be confessed, are somewhat artificial and hollow; but her letters, and, more remarkable than either her verses or her letters, her ‘Thoughts’ on the ‘Mystery of the Death of Christ,’ are in some respects very fine, and might even claim a place beside some of those of her brother. They are equally elevated in tone, and pervaded by the same subtle, penetrating, radiant mysticism, the same rapture of self-sacrificing aspiration, though lacking the glow of inward fire and exquisite charm of style which marked the author of the ‘Pensées.’ Noble-minded and full of genius, she was yet without his depth and power of feeling, or his skill and finish as an author. In 1646 she came, along with her brother, and greatly through his influence, strongly under the power of religion; and in 1652, after her father’s death, she renounced the world, and became one of the Sisters of Port Royal. She died amidst the persecution of the Sisters in 1661, a year before her brother. In Paris the elder Pascal became a centre of men of congenial intellectual tastes with himself, and his house a sort of rendezvous for the mathematicians and the physicists of the time. Among them were Descartes, Gassendi, Mersenne, Roberval, Carcavi, and Le Pailleur; and from the frequent reunion of these men is said to have sprung the Academy of Sciences founded in 1666. It is interesting to notice that it was into this same society that Hobbes was introduced on his first and second visits to France, when he accompanied the future Duke of Devonshire there as tutor. With Father Mersenne and Gassendi especially he formed a warm friendship, which sheds an interest over his life. Possibly in some of these reunions the author of the ‘Leviathan’ may have encountered the young Pascal, and joined in the half admiration and half incredulity which his wonderful powers had begun to excite.