Professor Langhans notes, in his history of music, that in the Middle Ages, as late as Luther's time, it took two men to compose the simplest piece of music: one who conceived the melody, and the other who added the harmonic accompaniment. The theoretical writer, Glareanus, deliberately expressed his opinion, in 1547, that it might be possible to unite these two functions in one person, but that one would rarely find the inventor of a melody able to work it out artistically. We have made much progress in music within these three hundred years, and to-day every composer is not only expected to invent his own harmonies and accompaniments to his melodies, but, since Wagner set the example, composers are beginning to consider it incumbent on them to write their own librettos; and, what is more remarkable, if we examine biographies of musicians carefully we find that, even before Wagner, not a few composers assisted in the preparation of their operatic texts; and this remark applies even to some of the Italian composers, who were proverbially careless regarding their librettos. Rossini was, perhaps, too indolent to devote much attention to his texts, and he was apt to postpone even the musical work to the last moment, so that he sometimes had to be locked up in his room by his friends, to enable him to finish his score by the date named in his contract. Yet it is worthy of note that during the composition of what Rossini's admirers commonly regard as his best and most characteristic work—the "Barber of Seville"—he lived in the same house with his librettist. "The admirable unity of the 'Barber,' in which a person without previous information on the subject could scarcely say whether the words were written for the music or the music for the words, may doubtless," as Mr. Sutherland Edwards suggests, "in a great measure be accounted for by the fact that poet and musician were always together during the composition of the opera; ready mutually to suggest and to profit by suggestions."
"Donizetti," the same writer informs us, while at the Bologna Lyceum, "occupied himself not only with music, but also with drawing, architecture, and even poetry; and that he could turn out fair enough verses for musical purposes was shown when, many years afterward, he wrote—so rapidly that the word 'improvise' might here be used—for the benefit of a manager in distress, both words and music of a little one-act opera, called 'Il Campanello' founded on the 'Sonnette de Nuit' of Scribe. Donizetti also arranged the librettos of 'Betty' and 'The Daughter of the Regiment,' and of the last act of 'Lucia' he not only wrote the words but designed the scenes."
Concerning Verdi, Arthur Pougin says: "It is not generally known that, virtually, Verdi is himself the author of all his poems. That is to say, not only does he always choose the subject of his operas, but, in addition to that, he draws out the sketch of the libretti, indicates all the situations, constructs them almost entirely as far as regards the general plan, brings his personages and his characters on the stage in such a way that his collaborateur has simply to follow his indications to bring the whole together, and to write the verses."
One of Verdi's poetic assistants was Francesco Piave, who supplied the verses for "La Traviata," "Ernani" and several other of his operas. He was, Pougin informs us, "a tolerably bad poet, quite wanting in invention," but he had the most important quality (from Verdi's point of view) "of effacing himself completely, of putting aside every kind of personal vanity and of following entirely the indications and the desires of the composer, cutting out this, paring down that, shortening or expanding at the will of the latter—giving himself up, in short, to all his exigencies, whatever they might be."
A question having arisen some years ago, as to the origin of the libretto of "Aida," the author of it, M. du Locle, wrote to a Roman paper that the first idea of the poem belongs to the celebrated Egyptologist, Mariette Bey. He adds: "I wrote the libretto, scene by scene, phrase by phrase, in French prose, at Busseto, under the eye of the maestro, who took a large share in the work. The idea of the finale of the last act, with its two stages, one above the other, belongs especially to him."
The libretto for Verdi's last work, "Otello," was prepared by Boïto, who had previously assisted him in rearranging his "Simon Boccanegra," and who also wrote the poem of "La Gioconda" for Ponchielli. Boïto is a thorough believer in Wagner's doctrine that every composer should write his own opera books, and he followed this rule in his interesting opera "Mefistofele."
Mozart was altogether too careless in accepting librettos unworthy of his genius. Yet occasionally he took the liberty to improve the stuff that was submitted to him. As the learned librarian, Herr Pohl, remarks, "In the 'Entführung' it is interesting to observe the alterations in Bretzner's libretto which Mozart's practical acquaintance with the stage has dictated, to the author's great disgust. Indeed, Osmin, one of the most original characters, is entirely his own creation, at Fischer's suggestion."
Weber resembled Wagner, among other things, in the habit of carrying plans for operas in his head for many years. Thus we read that while on the look out for a subject for an opera he and Dusch hit upon "Der Freischütz," a story by Apel, then just published. At the time, however, it did not get beyond the beginning; and not till seven years later did Weber begin the work which made his reputation, a work which in Dresden, where it was first produced, has had already more than a thousand performances, and which even in London was at one time played simultaneously at three theatres. When he finally did begin his work on the "Freischütz" the libretto he used was by another author, Herr Kind, a man of considerable dramatic ability, but who—perhaps for that very reason—was subsequently so mortified by the fact that Weber's superior genius caused his music to receive the lion's share of the public's attention, that he refused to write another libretto for him. This was unfortunate, for, as ill luck would have it, Weber fell into the hands of a Leipsic blue stocking, Wilhelmine von Chezy, whose literary gifts were not of the most brilliant order. She submitted several subjects to him, from which he selected "Euryanthe;" but her sketch proved so unsatisfactory that he altered it entirely and compelled her to work it over nine times before he was sufficiently satisfied with it to set it to music. The libretto for his last opera, "Oberon," was prepared for him in London, but the subject, as usual, was his own choice and was based on Wieland's famous poem of that name. Weber's rare artistic conscientiousness is indicated by the fact that at this time, although he felt that his end was approaching, he set to work to learn the English language in order to avoid mistakes in adapting his melodies to the accent of the words and the spirit of the text.
Having now caught a glimpse of the manner in which the great composers find subjects for their operas, and elaborate them, with or without the assistance of poets, we may go on to consider the sources of the musical inspiration which provides appropriate melodies and harmonies for these texts. Experience shows conclusively that the most powerful stimulant of the composer's brain is the possession of a really poetic and dramatic text. To take only one instance—it surely cannot be a mere coincidence that the best works of four great composers—Spohr, Berlioz, Gounod, and Schumann, are based on the story of "Faust." And Schumann, in one of his private letters, indicates very clearly why his "Faust" is such an inspired composition. Speaking of a performance of this work he says: "It appeared to make a good impression—better than my 'Paradise and Peri'—no doubt in consequence of the superior grandeur of the poem which aroused my powers also to a greater effort."
More significant still are the words which Weber wrote to Fran von Chezy when she was writing the libretto for "Euryanthe;" which he intended to make better than all his previous works. "When you begin to elaborate the text," he wrote; "I entreat you by all that is sacred to task me with the most difficult kinds of metre, unexpected rhythms, etc., which will force my thoughts into new paths and draw them out of their hiding-places."