Suddenly, from the top of the bluff behind the camp, came half a dozen shots, and the sentinel who had been posted there rushed in, shouting, "Indians! Indians!" This time the enemy proved to be two overland stages, loaded with mails and troops, who had fought their way through from Denver. These had mistaken the sentinel for an Indian, and fired at him, while he, thinking from this that they certainly must be Indians, had fired back.