midnight
` Then at the dawn of morning meet me at the private gate of your palace garden , and I will conduct you to Antonina 's bedchamber . ' ` The time will suit me . But why at the dawn of morning ? ' ` Because the Christian dotard will keep a vigil until midnight , which the girl will most probably attend . I wished to tell you this at your palace , but I heard there that you had gone to Aricia , and would return by way of the basilica ; so I posted myself to intercept you thus . ' ` Industrious Ulpius ! ' ` Remember your promise ! '