Education
He was schooled at the Lycée Pierre-Corneille and subsequently studied painting with Joseph Delattre.
He was schooled at the Lycée Pierre-Corneille and subsequently studied painting with Joseph Delattre.
Dumont founded the Groupe des XXX (1907), and along with Robert Antoine Pinchon, Yvonne Barbier, and Eugène Tirvert founded the Société Normande de Peinture Moderne (1909). He turned towards Cubism during this period and played a crucial role in the organization of the Salon de la Section d"Or at the Galerie Louisiana Boétie in Paris, October 1912.