Lady Diana's first official appearance as the fiancé of HRH Prince Charles in March 1981. To Diana, the black taffeta gown spelled glamour. To Charles, it rang alarm bells. When the Queen saw it, the Palace echoed with her displeasure. Now Diana knew what a potent weapon her wardrobe was. Not only that dress was too revealing but, as far as the Royals were concerned, black spelled mourning.