For ten years his inner ways were vacant. Before he died they were the most crowded of all, and vast light frameworks with wheels of twenty and thirty feet in diameter, hurled along them at paces that year after year rose steadily towards two hundred miles an hour. And by the time this revolution was accomplished, a parallel revolution had transformed the ever-growing cities. Before the development of practical science the fogs and filth of Victorian times vanished. Electric heating replaced fires (in 2013 the lighting of a fire that did not absolutely consume its own smoke was made an indictable nuisance), and all the city ways, all public squares and places, were covered in with a recently invented glass-like substance. The roofing of London became practically continuous. Certain short-s
