Marcel Duchamp and Katherine Dreier in the Parque Maria Luisa, Seville

~“Because a man is a manufacturer and makes excellent steel rails, does not guarantee him to be an authority on the manufacturing of silks, nor would we demand it. Yet we call upon the doctor to pass on the mental make-up of our modern artists, delighted when they pronounce them mad, or art historians to pass on the coming of a new era, when the whole training...