Author of poetry and novels which are a mixture of fantasy and realism, simplicity and irony, in the cubist manner, e.g. Les Féeries (1907), Le Calumet (1910), Prikaz (1919), Peindre (1922), Tendres Canailles (1913), La Négresse du Sacré-Coeur (1920), L'Entrepreneur d'illuminations (1921). He was one of a group which included Guillaume Apollinaire, Max Jacob, and in art, Picasso, and is also known as a critic of art. (The Oxford Companion to French Literature, Oxford, 1986, 657)