Paul Valéry (1871-1945) published some early poetry before 1900 but then disappeared completely from the literary scene until 1917 when La jeune Parque came out in print. Like Mallarmé, Valéry is an implacable perfectionist, and he demands of form what the older poet sought in harmonic effects. Valéry is above all an intellectual poet whose work requires a real effort on the part of the reader. His influence on the twentieth century has been very great.
"Paul Valéry." Representative French Poetry. Ed. Victor E. Graham. 2nd edn. Toronto: University of Toronto Press, 1965. 112-14.