If the reader should inquire what special claims the present author can put forward to treat so complex and indeed novel a subject, the first reply is, of course, that he has thought a long time and with much care about it, and this, for a theorist, is sufficient vindication. But it may fairly be added that a writer on the principles of conversation ought to live in a country where the practice of it is confessedly on a high level, and where the average man is able to talk well.