"The cold winds are blowing again from the Land of Always Winter, Lord Glover, and I have seen them myself. Our ancestors did defeat the enemy during the Long Night, but they did not destroy them. The Others were only pushed back. Brandon the Builder did not have a wall seven hundred feet high and three hundred miles long on a whim. Dragonglass is one of the few things that can destroy the enemy. Why do you think I allowed the Free Folk to pass south of the Wall?" Jon Stark asked quietly.