We have mentioned that Rosalie Levasseur was the mistress of Mercy-Argenteau, the Austrian Ambassador at the French Court. Shrewd and capable though Mercy was in everything relating to his professional duties—the manner in which he had succeeded in keeping the peace, and all that it involved, between Marie Antoinette and Madame du Barry, during the last years of the late King’s reign was a perfect masterpiece of diplomacy—in love, he appears to have been as foolish as any of the gilded youths who haunted the coulisses of the Opera and the Comédie-Française. The fair Rosalie exercised the most absolute ascendency over him—a fact which was the more astonishing, as all Paris knew that she had an amant de cœur, in the person of Nicolet, the clown. Mercy, in fact, could deny her nothing, and even carried his infatuation so far as to purchase for her a barony of the Holy Roman Empire, with a considerable revenue; while, on another occasion, he condescended to bribe Larrivée, whose singing in a certain opera the young lady found was quite eclipsing her own, not to put forth his full powers.[52]

Now, Rosalie had set her heart upon supplanting Sophie and filling the principal part in the forthcoming opera, and called upon her lover to assist her to realise her ambition. First, she suggested—or persuaded Mercy to suggest—that Gluck should take up his quarters in her house, in the Rue des Fossoyeurs-Saint-Germain, and give her singing-lessons; a proposal to which the composer, who, besides being an Austrian subject, was under considerable obligations to the Ambassador, who, with Marie Antoinette, had been mainly instrumental in bringing him to Paris, readily consented. Next, she induced him to teach her the music of Alceste and took care to show herself a docile as well as an industrious pupil. Finally, she hinted pretty plainly that he ought to entrust her with the title-part when the opera was produced, pointing out that, though she might lack the histrionic ability of Mlle. Arnould, her voice was fresher and more powerful, to say nothing of the advantage which the composer would derive from having the part rendered exactly as he desired, whereas the elder actress would very probably insist on rendering it in conformity with her own ideas.

These arguments were, it is needless to say, warmly seconded by Mercy; and Gluck, who was anxious to please the amorous diplomatist, and in whose mind the insult he had received from Sophie’s titular protector perhaps still rankled, after some hesitation, yielded to their wishes.

“Gluck,” says the composer’s French biographer, Desnoiresterres, “was wanting in gratitude towards Mlle. Arnould, so charming, so passionate in Iphigénie, so pathetic still, though somewhat eclipsed by Legros, in Orphée.” At the same time, he points out that Gluck would never have superseded Sophie had he thought that the change would prejudice his work, and that the event proved that he had not over-estimated the talents of Rosalie Levasseur, who, in the part of Alceste, “displayed much art and sensibility.”[53]

Poor Sophie seems to have borne her disappointment, notwithstanding that she could hardly have failed to see in it the end of her own dramatic career, with praiseworthy equanimity, merely observing when she heard the news: “Rosalie ought certainly to have the part; she has the voice of the people.” This remark was duly repeated to her triumphant rival, who retaliated by a disgusting lampoon, composed by one of her admirers named Guichard, copies of which were printed and circulated in the theatre, while others were sent to Sophie’s friends. The injured lady, however, was equal to the occasion; she sent certain copies which had fallen into her hands to the journals, and turned the tables very adroitly on Mlle. Levasseur and her ally, all decent-minded persons combining to condemn such methods of warfare.

Although the dethroned prima donna wisely refrained from giving public expression to her feelings, others were not prepared to imitate her discretion. The Prince d’Hénin, who could be very bold indeed when there was no likelihood of his being called upon to fight a duel, having heard that there was some talk of giving Sophie’s dressing-room at the Opera to Rosalie Levasseur, went down to the theatre and threatened to flog the unfortunate directors within an inch of their lives, if they dared to inflict such a slight upon a lady whom he honoured with his protection; the few critics who still remained faithful to the waning star condemned in unmeasured terms the selection of Mlle. Levasseur for so important a rôle in place of an actress “who had so long been, and still was, the delight of the Opera”; while the Anti-Gluckists, only too delighted to find so stout a stick wherewith to belabour the composer, raised a perfect howl of indignation.