At a distance from London (say as small a distance, in time if not space, as Bath), you will hear it said that everybody is well in London, but in London you will find that the hygienic critics or authorities distinguish. All England, indeed, is divided into parts that are relaxing, and parts that are bracing, and it is not so strange then that London should be likewise subdivided. Mayfair, you will hear, is very bracing, but Belgravia, and more particularly Pimlico, on which it borders, is terribly relaxing. Beyond Pimlico, Chelsea again is bracing, and as for South Kensington it stands to reason that it is bracing because it is very high, almost as high as Mayfair. If you pass from your Pimlico borderland of Belgravia to either of those regions you are certainly not sensible of any sharp accent, but there is no telling what a gradual rise of eight or ten feet may make in the quality of the air. To the stranger all London seems a vast level, with perhaps here and there the sort of ground-swell you may note from your car-window in the passage of a Western plain. Ludgate Hill is truly a rise of ground, but Tower Hill is only such a bad eminence as may gloomily lift itself in history irrespective of the actual topography. Such an elevation as our own Murray Hill would be a noticeable height in London, and there are no such noble inequalities as in our up-town streets along the Hudson. All great modern cities love the plain surfaces, and London is not different from Chicago, or Philadelphia, or Paris, or Berlin, or Vienna, or St. Petersburg, or Milan in this; New York is much more mountainous, and Boston is a Sierra Nevada in comparison.