Now, as to our adjective "classical:" Why not, in heroic drama, have something a-kin to the old Greek chorus, with its running comment upon motives and moralities, somewhat as the mighty-master has set forth in his truly patriotic '_Henry the Fifth ?_'-- However, taking other grounds, the epithet is justified, both by the subject and the proposed unmodern method of its treatment: but of all this enough, for, on second thoughts, perhaps we may do without the chorus.
It is obvious that no historical play can strictly preserve the true unity of time; cause and effect move slower in the actual machinery of life, than the space of some three hours can allow for: we must unavoidably clump them closer; and so long as a circumstance might as well have happened at one time as at another, I consider that the poet is justified in crowding prior events as near as he may please towards the goal of their catastrophe.

If then any slight inaccuracy as to dates arrests your critical ken, believe that it is not ignorantly careless, but learnedly needful.

One other objection, and I have done.

No man is an utter inexcusable, irremediable villain; there is a spot of light, however hidden, somewhere; and, notwithstanding the historian's picture, it may charitably be doubted whether we have made due allowance for his most reasonable prejudice even in Nero's case.

Human nature has produced many monsters; but, amongst a thousand crimes, there has proverbially lingered in each some one seedling of a virtue; and when we consider the corruption of manners in old Rome, the idolatrous flatteries hemming in the prince, the universal lie that hid all things from his better perceptions, we can fancy some slight extenuation for his mad career.
Not that it ever was my aim, in modern fashion, to excuse villany, or to gild the brass brow of vice; and verily, I have not spared my odious hero; nevertheless, in selecting so unamiable a subject, (or rather emperor,) I wished not to conceal that even in the worst of men there is a soil for hope and charity; and that if despotism has high prerogatives, its wealth and state are desperate temptations, whose dangers mightily predominate, and whose necessary influences, if quite unbiased, tend to utter misery.
Now to introduce our _dramatis personae_, with their "cast,"-- for better effect--rather unreasonably presumed.