[on George Gershwin's 'Concerto in F'] Lady Jazz, adorned with her intriguing themes, has danced her way around the world. But for all her travels and her sweeping popularity, she has encountered no knight who could lift her to a level that would enable her to be received as a respectable member in musical circles. George Gershwin seems to have accomplished this miracle. He has done it boldly by dressing this extremely independent and up-to-date young lady in the classic garb of a concerto. Yet he has not detracted one whit from her fascinating personality. He is the prince who has taken Cinderella by the hand and openly proclaimed her a princess to the astonished world.