Book excerpt: Here she tells how Buffalo Bill taught her to ride, describes how she redefined the standards of attractiveness with the quirky models she brought to Vogue in the sixties, disparages her own looks, relates her search for the perfect red, and discourses on the nature of elegance. Whatever her subject, from backaches to nostalgia, from Paris to New York, from marriage to dinner parties, from Clark Gable to Swifty Lazar, you never want her to stop. For D.