Margaux Hemingway had the appearance of a picture-perfect life. The gorgeous granddaughter of Ernest Hemingway, she was one of the most successful models of the 1970s. With her statuesque, six-foot frame and classic facial features, she appeared in high-profile magazines (including the cover of Time) and was the spokesperson for Faberge, promoting a fragrance appropriately titled Babe. In 1976 Margaux starred in her...