sentences:  He collaborated with Orsi in his "De Romani pontificis in synodos oecumenicas et earum canones potestate".Soon pope Benedict XIV appointed him prefect of the Casanatensian Library, master of theology and consultor of the Congregation of the Index.Owing to his office he had to take part in the controversy between the Appellants (Jansenists) and the Jesuits, and displayed an impartiality which greatly increased the difficulties of his anxious and laborious position.