I prefer the preface in The Adventures of Huckleberry Finn:
PERSONS attempting to find a motive in this narra- tive will be prosecuted; persons attempting to find a moral in it will be banished; persons attempting to find a plot in it will be shot.
BY ORDER OF THE AUTHOR,
Per G.G., Chief of Ordnance.
IN this book a number of dialects are used, to wit: the Missouri negro dialect; the extremest form of the backwoods Southwestern dialect; the ordinary “Pike County” dialect; and four modified varieties of this last. The shadings have not been done in a haphazard fashion, or by guesswork; but painstakingly, and with the trustworthy guidance and support of personal familiarity with these several forms of speech.
I make this explanation for the reason that without it many readers would suppose that all these characters were trying to talk alike and not succeeding.