Margot Asquith? Margot Grahame? Apocryphal? Dear Quote Investigator: According to a Hollywood legend there was a pointed verbal encounter between the movie siren Jean Harlow and the sharp-tongued English aristocrat Margot Asquith. When Harlow attended a party given by Asquith, the movie star presumptuously referred to the hostess by her first name, and she repeatedly …