““patrolled by the Heavenly Guard whose main function was to tread heavily on the fingers of any inhabitants who felt they might like to step outside for five minutes for a breath of fresh air. This didn’t happen often, because most of the subjects of the Sun Emperor were quite happy to live inside the Wall. It’s a fact of life that everyone is on one side or other of a wall, so the only thing to do is forget about it or evolve stronger fingers.””
