A gray light, half dusk, revealed the outlines of the cab interior, as he opened his eyes, and a thundering, rumbling sound that rang in his ears and seemed everywhere about him cleared his mind and brought him back to his situation. It was cold, and he looked at the stove. The fire was out. On the opposite side of the cab the brakeman lay on the cushions fast asleep. Outside, the thundering noises came continuously from everywhere at once. It did not occur to Bucks that the caboose was standing still. It trembled and vibrated more or less, but he noticed there was no longer any lurching and thought they had reached remarkably smooth track. They were certainly not standing still, he assured himself, as he rubbed his eyes to wake up. But perhaps they might be in the yards at Medicine Bend, with other trains rolling past them. Somewhat confused he raised the curtain of the window near him. The sky was overcast and day was breaking. He rose higher on his elbow to look more carefully. Everywhere that his eye could reach toward the horizon the earth seemed in motion, rising and falling in great waves. Was it an earthquake? He rubbed his eyes. It seemed as if everywhere thousands of heads were tossing, and from this continual tossing and trampling came the thunder and vibration. Moreover, the caboose was not moving; of this he felt sure. Amazed, and only half-awake, he concluded that the train must have left the track and dropped into a river. The uncertainty of his vision was due, he now saw, to a storm that had swept the plains. It was blowing, with a little snow, and in the midst of the snow the mysterious waves were everywhere rising and falling. Bucks put the curtain completely aside. The sound of his feet striking the floor aroused the conductor, who rose from his cushion with a start. "I've been asleep," he exclaimed, rubbing his eyes. "Where are we, Bucks?" "That is what I am trying to figure out." "Where is the brakeman?" demanded Francis. As he asked the question he saw the big fellow asleep in the corner. Francis shook him roughly. "That comes of depending on some one else," he muttered to Bucks. "I went to sleep on his promise to watch for an hour--he knew I had been up all last night and told me to take a nap. You see what happened. The moment I went to sleep, he went to sleep," exclaimed Francis in disgust. "Wake up!" he continued brusquely to the drowsy brakeman. "Where are we? What have we stopped for? What's all this noise?" Though he asked the questions fast, he expected no answer to any of them from the confused trainman and waited for none. Instead, he threw up a curtain and looked out. "Thunder and guns! Buffaloes!" he cried, and seizing his lantern ran out of the caboose door and climbed the roof-ladder. Bucks was fast upon his heels.