It is quite possible to write poetic drama in prose, though to use prose rather than verse is to write with the left hand rather than with the right. Before Ibsen, prose had been but a serving-maid to verse; and no great dramatist had ever put forward the prose conception of the drama. Shakespeare and the Elizabethans had used prose as an escape or a side-issue, for variety, or for the heightening of verse. Moliere had used prose as the best makeshift for verse, because he was not himself a good craftsman in the art. And, along with the verse, and necessarily dependent upon it, there was the poetic, the romantic quality in drama. Think of those dramatists who seem to have least kinship with poetry; think, I will not say of Moliere, but of Congreve. What is more romantic than _The Way of the World_? But Ibsen extracts the romantic quality from drama as if it were a poison; and, in deciding to write realistically in prose, he gives up every aim but that which he defines, so early as 1874, as the wish 'to produce the impression on the reader that what he was reading was something that had really happened.' He is not even speaking of the effect in a theatre; he is defining his aim inside the covers of a book, his whole conception of drama. The art of imitation has never been carried further than it has been carried by Ibsen in his central plays; and with him, at his best, it is no mere imitation but a critical interpretation of life. How greatly this can be done, how greatly Ibsen has done it, there is _Ghosts_ to show us. Yet at what point this supreme criticism may stop, what remains beyond it in the treatment of the vilest contemporary material, we shall see if we turn to a play which seems at first sight more grossly realistic than the most realistic play of Ibsen--Tolstoi's _Powers of Darkness_. Though, as one reads and sees it, the pity and fear seem to weigh almost intolerably upon one, the impression left upon the mind when the reading or the performance is over, is that left by the hearing of noble and tragic music. How, out of such human discords, such a divine harmony can be woven I do not know; that is the secret of Tolstoi's genius, as it is the secret of the musician's. Here, achieved in terms of naked horror, we find some of the things which Maeterlinck has aimed at and never quite rendered through an atmosphere and through forms of vague beauty. And we find also another kind of achievement, by the side of which Ibsen's cunning adjustments of reality seem a little trivial or a little unreal. Here, for once, human life is islanded on the stage, a pin-point of light in an immense darkness; and the sense of that surrounding darkness is conveyed to us, as in no other modern play, by an awful sincerity and an unparalleled simplicity. Whether Tolstoi has learned by instinct some stagecraft which playwrights have been toiling after in vain, or by what conscious and deliberate art he has supplemented instinct, I do not know.