three o'clock
`` Oh , no , oh , no ! I would rather die . '' `` Again that sentimental exaggeration ; but you shall prove your words . If you have not confessed to me before three o'clock to-day all you know about the loss of my treasured dog Scorpion , I shall take you into your father 's sick room , and in his presence dare you to keep your wicked secret to yourself any longer . '' `` Oh , you do n't mean that , '' said Firefly . `` You ca n't be so awfully cruel . Nell , Nell , do say that Aunt Maria does n't mean that . ''