In the Shaksperian drama the underlying convention is that the persons of the play belong to a race of people who always express themselves poetically in English blank verse. In opera this necessary agreement requires us to concede the existence of men and women to whom song is the natural means of communicating all their sentiments and all their thoughts. If we are willing to accept this implied contract, then there is no absurdity in Tristan's singing with his dying breath, since he belongs to a race of creatures who have no other method of speech. If we are unwilling to be parties to this agreement, if we deny the existence of any such creatures, then there is nothing for us to do but to keep out of the opera-house. It was this convention which Tolstoy rejected, and by this rejection he refused the enjoyment which the opera can give to those who are satisfied to accept its conditions. IV But there is no denying that the imperative operatic convention requires us to admit a very violent departure from the facts of life as we all know them. We are now so accustomed to blank verse in Shakspere's plays, tragic and comic, that we accept it almost without noticing it. By long habit, we have come to consider blank verse as "natural" in a poetic play, especially when that play sets before us heroic figures of the remote past. And here is the danger in the operas which have been composed on books made out of modern popular pieces, more or less realistic in their atmosphere. The "naturalness" of the men and women in these plays of to-day tends to draw attention to the "unnaturalness" of their customary use of song to express their emotions. This danger Wagner skilfully avoided in his later music-dramas derived from the Nibelungen myth. He set before us shadowy creatures involved in strange intrigues far back in the legendary past and wholly devoid of any modern or realistic suggestion. As Tristan and Siegfried and Brunhild are all idealized persons, taking part in poetic fictions, we are willing enough to accept their exclusive use of song; and we recognize at once the artistic inconsistency of Tolstoy's protest. To beings so remote from our daily life, from our ordinary experience, the standard of fact cannot fairly be applied. We acknowledge the full right of such creatures to dwell eternally in the land of song alone.