... By Horace Horsnell Arc tie Triomphe (Plicenix) MR. IVOR NOVELLO'S latest play is un deniably canonical. No one could mis take it for a work by Noel Coward, Wagner, or Gilbert and Sullivan. Its amiable features-- musical, sentimental and dramatic-- are as clearly his own as those of Hamlet, say, are Shakespearean, or the unwinking regard of the waxen celebrities of the Marylebone Road is ...