But there was no chance of escape on this bare, high point of the mountain. To throw himself down, or go rushing and scrambling over the rocks and every thing else that lay in his way, as he would have done in another place, would not do here, where a false step or a slip would carry him to certain death; and, in a moment, John Porter had his hand upon his collar, and giving him a rough shake, ordered him to give up the cup.