He was a friend and correspondent of Gassendi whom he first met while he was at Aix-en-Provence and he also corresponded with Huygens, Leibniz, Descartes, Mersenne and others.
Siya ay isang kaibigan at kasulatan ng Gassendi kanino siya unang nakikita habang siya ay sa Aix-en-Provence at siya rin corresponded sa Huygens, Leibniz, Descartes, Mersenne at iba pa.