Let us, in the first place, listen to the opening of the "Preface of the Fourth Edition:" "No one can be more sensible than I am of the many faults and deficiencies to be found in this play; but, perhaps, when it is considered how very rarely it has happened in the history of our dramatic literature that good acting plays have been produced, except by those who have either been actors themselves, or formed their habits of literature, almost of life, behind the scenes, I might have looked for a criticism more generous, and less exacting and rigorous, than that by which the attempts of an author accustomed to another class of composition have been received by a large proportion of the periodical press.
"It is scarcely possible, indeed, that this play should not contain faults of two kinds, first, the faults of one who has necessarily much to learn in the mechanism of his art; and, secondly, of one who, having written largely in the narrative style of fiction, may not unfrequently mistake the effects of a novel for the effects of a drama.

I may add to these, perhaps, the deficiencies that arise from uncertain health and broken spirits, which render the author more susceptible than he might have been some years since to that spirit of depreciation and hostility which it has been his misfortune to excite amongst the general contributors to the periodical press for the consciousness that every endeavor will be made to cavil, to distort, to misrepresent, and, in fine, if possible, to RUN DOWN, will occasionally haunt even the hours of composition, to check the inspiration, and damp the ardor.
"Having confessed thus much frankly and fairly, and with a hope that I may ultimately do better, should I continue to write for the stage (which nothing but an assurance that, with all my defects, I may yet bring some little aid to the drama, at a time when any aid, however humble, ought to be welcome to the lovers of the art, could induce me to do), may I be permitted to say a few words as to some of the objections which have been made against this play ?" Now, my dear sir, look what a pretty number of please you put forrards here, why your play shouldn't be good.
First.

Good plays are almost always written by actors.
Secknd.

You are a novice to the style of composition.
Third.

You MAY be mistaken in your effects, being a novelist by trade, and not a play-writer.
Fourthly.