Letters on the Quietist Affair (I)
This book is in French.
The letters of Bossuet and his correspondents on the Quietist affair, 1694 to 1698: Madame Guyon, M. Tronson, Fénelon, M. de Noailles, then the correspondence with his nephew the abbé Bossuet and the abbé Phelippeaux in Rome. Lachat edition (1864), volumes XXVIII-XXIX.