nine o'clock
At the same time Paul surveyed the black sky with secret misgivings , wondering what they would have to do should a tornado sweep down upon them there on the side of the mountains , and demolish their tents . The scouts turned in earlier than usual that night , for Mr. Gordon thought it well to get what sleep they could . He went the rounds last of all , to make sure the provisions could not be wholly ruined by water , no matter what befell . By nine o'clock the camp was wrapped in silence , even the fire dying out . The moan of the wind through the pines further up the mountain helped to sing most of the scouts to sleep . Two hours later the guard was changed ; and again silence fell upon the scene . It must have been midnight and past when Paul was awakened by what he thought was the rush and roar of a railroad train .