There is an old saying that "one half of the world does not know how the other half lives," but how true this is very few of us really understand. In the East, indeed, it amounts almost to the marvellous. There are men engaged in trades there, some of them highly lucrative, of which the world in general has never heard, and which the ordinary stay-at-home Englishman would in all probability refuse to believe, even if the most trustworthy evidence were placed before him.