A POIGNANT love story told with all Mr. Nathan’s sure and delicate skill. A penniless artist falls in love with a most appealing young girl — lost in a sliding relativity of time. She comes out of nowhere into the now and returns again; one senses the approaching and inescapable doom. The timing complications — in addition to those of the main theme — seem gratuitously confusing. This lovely story succeeds, not because of the tricks, but in spite of them. In spite of minor characters taken from stock, in spite of dating the last page 1949, Jennie wrings the heart.