six o'clock
`` The Princess Hildegarde . '' The envelope reminded me of a rusty scabbard ; there was a very keen weapon within . I lit my pipe and puffed for a while . `` Cousin , '' said I , `` I have a premonition that I shall not kill Prince Ernst of Wortumborg at six o'clock to-morrow morning . '' `` What put that into your head ? You are not going to back down , after all , are you ? '' `` Decidedly not .