about four o'clock
`` Well , if we get tired of one spot we can move to another , '' said Whopper . It promised to be warm and clear that night , so they slept out under the trees , not far from their camp-fire . All was very quiet , not even a hoot-owl coming to disturb them . But about four o'clock Snap awoke with a start and sat bolt upright . Something had awakened him , but he could not tell what . He aroused Shep . `` What is it , Snap ? ''