In the entire history of modern art, miracles have occurred only twice, and both times in France. Just Before 1900, a poor, middle-aged civil servant, Henri Rousseau, a self-taught "Sunday painter," infused new energies and ideas into art. Shortly thereafter, a young, half-mad alcoholic of Montmartre, Maurice Utrillo, presented strange lanscapes which delighted the man in the street and astonished the connoisseur…