With the systematic study of the Latin, and to a slight extent also of the Greek classics, he conjoined that of logic in the prolix system of Crousaz; and he further invigorated his reasoning powers, as well as enlarged his knowledge of metaphysics and jurisprudence, by the perusal of Locke, Grotius and Montesquieu.
De Crousaz-Cretet, Le Duc de Richelieu en Russie et en France (1897), with which compare an article by L.
P. de Crousaz, Charles Monnard, Alexandre Vinet, Eugene Rambert, Juste Olivier and several members of the Secretan family.
'JEAN PIERRE DE CROUSAZ (1663-1750), Swiss writer, was born at Lausanne.
Gibbon, describing his first stay at Lausanne (1752-1755), writes in his Autobiography, "the logic of de Crousaz had prepared me to engage with his master Locke and his antagonist Bayle."
Either in quest of paradox, or actually unable to recognize the real tendencies of Pope's Essay on Man, he entered upon its defence against the Examen of Jean Pierre de Crousaz, in a series of articles (1738-1739) contributed to The Works of the Learned.