"No, I do not," she retorted.  "I took plenty of rest yesterday, in anticipation; while you were exposed all day to the scorching sun and the flies, and have been awake all night.  So please lie down and sleep; for in any case I must watch the river until our pursuers appear.  I promise you that when they have passed, and I have seen all that I can of them, I will come down and sleep too."