The letters to her daughter Solange, which have recently been published, irresistibly recall the letters of Mme de Sevigne to Mme de Grignan.
And the salons of Mme de Sevigne, of her daughter Mme de Grignan, and of the duchesse de Maine for a while gave the questions of philosophy a place among the topics of polite society, and furnished to Moliere the occasion of his Femmes savantes.
One of the chief authorities for the last years of Retz is Madame de Sevigne, whose connexion he was by marriage.
They are addressed in the form of narrative to a lady who is not known, though guesses have been made at her identity, some even suggesting Madame de Sevigne herself.
The chief are Madame de Motteville's memoirs for the period of the Fronde, and the letters of Madame de Sevigne and the memoirs of Saint-Simon for the later period.