Mathieu Petit-Didier, a Benedictine, published an anonymous volume of Remarques sur la bibliothèque des auteurs ecclésiastiques de M. Du Pin (Paris, 1691), and this was followed by two other volumes to which the author's name was appended (Paris, 1692 and 1696).
A more formidable enemy appeared in Bossuet, who, during a public thesis at the Collège de Navarre in 1692, condemned the audacity of the critic.