Goethe was wise enough to know that human invention is finite and that the number of possible effects is limited. He once told Eckermann and Soret that the Italian playwright, Gozzi, had asserted the existence of only thirty-six possible tragic situations, and that Schiller had taken much trouble in trying to prove that there were more, only in the end to find himself unable to gather even so many as Gozzi had collected. "It is almost impossible, in the present day," commented Goethe, "to find a situation which is thoroly new. Only the manner of looking at it can be new, and the art of treating it and representing it."

Unfortunately, we have not Gozzi's list of the three dozen situations, nor Schiller's smaller catalog to compare with it. Gérard de Nerval—that strangest figure of a strange period—considered the matter anew in the fervid days of French romanticism, and decided that there were in reality only twenty-four typical situations available for the theater; but his classification has also failed to come down to us. However, in the last decade of the nineteenth century an ingenious Frenchman, M. Georges Polti, accepting the number originally proposed by Gozzi, examined the plots of several thousand plays, classified the result of his arduous investigation, and published a little book of two hundred pages on the '36 Situations Dramatiques.'

Highly interesting as is M. Polti's book, there is not a little difficulty in grasping the theory upon which he has assorted his immense collection into exactly three dozen divisions. The logic of his grouping is not immediately apparent, as it would have been had he taken the passions, for instance, as the several foundations. His first situation, for example, is that which we find in one of the earliest of Greek plays, the 'Suppliants.' M. Polti entitles it 'To Implore,' and he indicates varying possible subdivisions: (A1) Fugitives imploring shelter against their enemies, as in the tragedy of Æschylus, the second act of Shakspere's 'King John,' and repeatedly in 'Uncle Tom's Cabin'; (B1) the ship-wrecked imploring hospitality, as in more than one ancient drama. But this first situation of his M. Polti finds to be infrequent on the modern stage, altho often met with in the Greek theater. His second situation, which we may call 'To Rescue from Imminent Danger,' has been widely popular alike with the ancients and the moderns, so we have in subdivision (A) a condemned person rescued by a hero, as in the myth of Andromeda, the folk-tale of Bluebeard, and the first act of 'Lohengrin'; and in subdivision (B2) a condemned person rescued by a guest of the house, as in the 'Alcestis' of Euripides.

These two situations, however, are far less effective in evoking the special pleasure proper to the theater than the nineteenth on M. Polti's list, "To kill unknowingly one of your own blood." The full force of the theatric effect of this situation is dependent on the spectators' complete knowledge of the relationship of slayer and slain, unsuspected by the victims themselves; and the strength of the situation resides not in the mere killing, which may indeed be averted at the last moment, but in the steadily gathering dread which ought to accompany the preparations for the evil deed. This situation in one or another of its subdivisions we find in 'Nicholas Nickleby,' as well as in 'Œdipus the King' and in 'Lady Inger of Ostraat'; in Sophocles it is a son who murders his unknown father, and in Ibsen it is a mother who murders her unknown son. It is to be found in the 'Semiramis' of Voltaire, in the 'Merope' of Alfieri, in the 'Ion' of Euripides, and again and again in Victor Hugo's dramas. M. Polti points out that this single situation is utilized as the culminating point at the very end of four of Hugo's plays—the 'Burgraves,' 'Marie Tudor,' 'Lucrèce Borgia' and 'Le Roi s'amuse' (which supplied the plot for the opera of 'Rigoletto') and he insists further that one or another subdivision of this situation has been employed by Hugo at least five times in the single drama of 'Lucrèce Borgia.' If there are still any who hold that Hugo as a dramatist was "of the race and lineage of Shakspere," they may find instruction in the fact that this highly artificial situation, which the superb French lyrist was seemingly unable to leave out of his arbitrarily complicated plots, was not employed even once by the great English dramatist.

Probably nothing would have more disagreeably surprized Hugo—who held himself to be extraordinarily prolific and various, and who indeed had abundant reason for this belief—than the disclosure of the fact that he had made use so often of a single situation. And this is evidence, if any was needed, that the repetition of the same situation by the same author, or even by a succession of authors down thru the ages, is more often than not wholly unconscious, and that it is the result, not so much of any poverty of invention, as of the absolute limitation of the number of possible situations. The utmost of novelty that any plot-maker may hope to attain now in the twentieth century is only the result of his own shuffling of the same pack with which all the plot-makers of the past have been playing. A new principle he can scarcely hope to invent for himself; and all that he can safely claim for his most original sequence of scenes is a patent on the combination.

M. Polti, indeed, has bravely offered to supply ten thousand new plots, put together by combining and recombining the manifold subdivisions of his thirty-six situations, some of which he has ascertained to have been sadly neglected by the playwrights of our time. One may venture to doubt whether there would be profit in taking advantage of this generous offer, for if certain situations essayed in the past have not been popular of late, there is warrant for wondering whether this neglect is not due to an instinctive feeling on the part of the playwright of the present that these situations would fail to excite the interest of the playgoers of our own time and to evoke an emotional response. To insure the success of a play, it is not enough that the author should combine an ingenious sequence of striking scenes; he has always the spectators to reckon with also, their likes and dislikes. The practical playwright knows only too well, and often by sad experience, that the audience of to-day does not relish certain situations which run counter to its prejudices and its predilections, however pleasing these same situations may have been to audiences of the past. The duty of personal vengeance, for example—which was at the center of the tragedy-of-blood, ever delightful to Tudor theatergoers—has been disestablished by the advance of civilization; and it is therefore no longer acceptable as the dominant motive of a drama of modern life.

There is not a little significance, however, in another of M. Polti's suggestions—that perhaps a portion of the beauty and power we discern in the great plays of the Greeks was directly due to the accepted limitation of the themes which a tragic writer held himself authorized to treat. The restriction of the number of available legends forced the successive dramatists of Athens to handle again, each in his turn, the dark stories already dealt with by his predecessors. The fateful lives of Œdipus, for example, and of his family, of Agamemnon, and of his unhappy offspring—these were shown in action in the orchestra of the theater of Dionysus again and again, by Æschylus, by Sophocles, by Euripides, and by many another poet-playwright of that splendid epoch whose works have not descended to us. Of necessity, the dramatist was nerved to keenest endeavor by the knowledge that his play had to withstand a comparison with other plays presenting the same characters in the same situations, and by the certainty that his personal contribution would stand out sharply. A similar ordeal was undergone by the great painters of the Italian Renascence, who tried their hands, almost all of them, on the Madonna with the Holy Child, on the Descent from the Cross, and on every other of the score of stock subjects then in favor for the appropriate decoration of altar and alcove and dome. There is wisdom in M. Brunetière's assertion that "just as obedience is the apprenticeship of command, so is imitation the novitiate of originality."

We may be assured that this narrow limiting of the number of themes likely to be treated by the painters of Italy and by the playwrights of Greece at once diminished the demand on them for mere invention and left them free to put forth the utmost strength of their imagination, so that the artist could express himself fully and interpret in his own fashion a subject certain to be handled sooner or later by the chief of his fellow-crafts-men. And if the descent from the sublime is not too sudden, attention might here be called to the similar method of measuring the skill of the individual performer which we perceive in a later and more scientific development of what was once almost a game of chance. In "duplicate whist," as it is called, identical hands are played in turn by a succession of players, who are thus put to the test sharply, each withstanding comparison with every one of his rivals.

A strange fascination there is in the wish that it might be possible to apply to the art of fiction—which is often little more than a game of chance—the comparative method of duplicate whist. It would be possible for us to weigh the merits of the novelists far more exactly, if we could only impose upon all of them, once in a way, the treatment of the same theme, every successive story-teller making it his own for the moment, assimilating it, handling it as he pleased, in accordance with his own instincts and his own principles. It would enable us to note how adroitly the artist in narrative could deal with a topic which he did not feel to be sympathetic or stimulating; and on the other hand, it would show us how much this author or that has been sustained by the signal good fortune which put into his hands once at least the one subject best suited to his method and his temperament. In time, it would train the critical reader in the habit of distinguishing between theme and treatment; and it would encourage him to face the task of weighing the merits of each of these separately.

Altho we cannot insist that the novelists of the twentieth century shall undergo this ordeal, we may amuse ourselves by guessing at the result if the test had been applied to the novelists of the centuries that have gone before. There is no difficulty in picking out a plot familiar to all of us now and universal in its appeal—a plot which any story-teller of any age might have chosen to develop in his own fashion. And perhaps no story is better fitted for this experiment than the heart-rending tale which Shakspere took from the Italian and transfigured by his genius into the immortal tragedy of 'Romeo and Juliet.' Quarrels between rival families have been frequent enough, and young couples there have always been who loved wilfully in spite of a heritage of hate. There is a never-fading enchantment in the story of their struggles, whatever the country where they lived and died, and whatever their station in society.