 His thesis treated the mammals of the French lower Eocene and their stratigraphy.After 1920, he lectured in geology at the Catholic Institute of Paris and after earning a science doctorate in 1922 became an assistant professor there.In 1923 he traveled to China with Father Émile Licent, who was in charge of a significant laboratory collaboration between the National Museum of Natural History and Marcellin Boule's laboratory in Tianjin.