Raoul DUFY (1877-1953). Autograph notes with sketches; black pencil; 5pages on 3 sheets of in-12 notebook (16.4 x 10.1 cm). Sketches for a painting depicting an orchestra in a concert hall (with balconies and columns), with color indications: "orange faces / brown red shadow / behind the head purple / the colors of the dresses are pink green blue mixed with black and white [...] the orchestra black green"...