 His "Amusement philosophique sur le language des bêtes" (Philosophical Amusements on the Language of the Animals), published in 1737, attracted the censure of his superiors, leading to his brief exile from Paris.It was translated into English, Italian, and German.His historical works on the Thirty Years' War and on the Treaty of Westphalia have been regarded as among the best historical books written by Jesuits.