There she became more and more Jansenist in opinion, and her piety and the remembrance of her influence during the disastrous days of the Fronde, and above all the love her brother, the great Conde, bore her, made her conspicuous.
The chief authority for Madame de Longueville's life is a little book in two volumes by Villefore the Jansenist, published in 1738.
Flagellation was occasionally practised as a means of salvation by certain Jansenist convulsionaries in the 18th century, and also, towards the end of the 18th century, by a little Jansenist sect known as the Fareinists, founded by the brothers Bonjour, cures of Fareins, near Trevoux (Ain).
He was subsequently exiled to Chatellerault as a Jansenist, but the sentence of banishment was repealed on a new retractation.
Marguerite Arouet, of whom her younger brother was very fond, married early, her husband's name being Mignot; the elder brother, Armand, was a strong Jansenist, and there never was any kind of sympathy between him and Francois.