Once upon a musical score, Camille Saint-Sa ns was stumped. He was composing a piece of music to entertain his friends. An idea twinkled in his mind. A musical fantasy. Animals in a parade. A tune beckoned. Camille inked in some quarter notes. The melody slipped away. I must let this idea bloom, Camille thought. He sat in the stuffed chair by the door and closed his eyes. Music and pictures swirled in his head: A tortoise waltzed. A peacock called...