Postwar revival --; the 1920s ; Pride of the Atlantic --; the ships of state ; Cabin ships and intermediate liners : Atlantic ferry in diversity --; the 1930s ; Call to arms --; North Atlantic liners on war service ; Legacy of war --; the challenge of restoration ; The final decades --; a new race for supremacy ; The final decades --; the transatlantic run of its peak ; Western ocean decline --; the end of an era