When Ned heard the assaults of the midnight visitor on his door he looked at his watch, then slipped over to the window facing the street. Twelve o'clock and the thoroughfare below still teeming with life. Peking has something over three millions of population, according to the records, but, as a matter of fact, no one knows the exact size of the town as to humanity, for the Chinese live in densely-packed districts, and there are no census reports given out.