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Just when you think you are at the world's end, you see smoke rising from East to West as far as the eye can turn, and then under it, also as far as the eye can stretch, houses,temples, shops and theatres, barracks and granaries, trickling along like dice behind....one, long, low, rising and falling, and hiding and showing line of towers... that is the wall.
Rudyard Kipling From `Puck of Pook's Hill'