La Pietra del Paragone was Rossini's next great success after L'Inganno Felice. The leading parts were assigned to Galli, afterwards one of the most famous bass-singers of his time, and to Madame Marcolini, who had played the principal character in L'Equivoco Stravagante, and who had particularly distinguished herself in that work by her singing of the final rondo before mentioned.
In La Pietra del Paragone Madame Marcolini was furnished with a final rondo of the pattern already approved, and in this, as in the earlier one, she gained a most brilliant success.
The libretto of La Pietra del Paragone is founded on an idea at least as old as that of Timon of Athens. Count Asdrubal, surrounded by friends and beloved by a charming young lady, is rash enough to wish to know whether the friendship and the love he seems to have inspired are due to himself and his own personal qualities, or to the riches he is known to possess. To determine the point he causes a bill of exchange for a large sum to be presented at his house. He himself appears in disguise to claim the money; and, in accordance with instructions given beforehand, the count's steward recognises the signature and honours the draft. The sum for which the bill has been made out is so large that to pay it the count's exchequer is absolutely drained. Some few of the friends stand the test well enough, but others, as might have been expected, prove insincere. As for the young lady, the "touchstone" has the effect of bringing out her character in the brightest colours. Timid by nature, she had hitherto refrained from expressing, except in the most reserved manner, the love she really entertains for Count Asdrubal. After his apparent ruin, however, the advances are all from her side; and she finds herself obliged to resort to all kinds of devices in order to compel him to a formal declaration. She even feels called upon to appear—though whether for logical or merely for picturesque reasons can scarcely at this distant date be decided—in a Hussar uniform; and in this striking garb Madame Marcolini sang the celebrated final rondo, saluting the public with her sabre in acknowledgment of their applause, and repeating the salutes again and again as the applause was renewed.
La Pietra del Paragone is quite unknown to the opera-goers of the present day. It belongs to the year 1812, and probably no one now living ever heard it. Many, however, have heard portions of it; for La Pietra del Paragone not having proved thoroughly successful as a whole, the composer extracted the best pieces from it and introduced them into La Cenerentola, which, five years later, was represented for the first time at Rome. The air "Miei rampolli," the duet "Un soave no so chè," the drinking chorus, and the baron's burlesque proclamation, were all borrowed or rather taken once and for ever from the score of La Pietra del Paragone. Some other pieces, too, from the same work were nearly fifty years later heard at least once in an opera attributed to Rossini brought out at Paris in the year 1859. It has been said that among Rossini's operas of the year 1812 were two written for the San Mosè of Venice. The second of these, L'Occasione fa il Ladro, made its appearance substantially at Naples in conjunction with the pieces just spoken of, extracted from La Pietra del Paragone. An Italian poetaster, Signor Berettoni, gave to his new arrangement of L'Occasione fa il Ladro (which, by the way, he had enriched with selections not only from La Pietra del Paragone, but also from Aureliano in Palmira) the title of Un Curioso Accidente.
Rossini, however, though he did not mind borrowing from himself, did not choose to be borrowed from without permission, as without dexterity, by other persons; and finding that a pasticcio made up of pieces taken more or less at random from the works of his youth was to be brought out as a new and original work, he addressed to the manager of the Théâtre des Italiens, M. Calzado, the following letter on the subject:—
"November 11th, 1859..
"SIR,—I am told that the bills of your theatre announce a new opera by me under this title Un Curioso Accidente.
"I do not know whether I have the right to prevent the representation of a production in two acts (more or less) made up of old pieces of mine; I have never occupied myself with questions of this kind in regard to my works (not one of which, by the way, is named Un Curioso Accidente). In any case I have not objected to, and I do not object to, the representation of Un Curioso Accidente. But I cannot allow the public invited to your theatre, and your subscribers to think either that it is a new opera by me or that I took any part in arranging it.
"I must beg of you then to remove from your bills the word new, together with my name as author, and to substitute instead the following:—'Opera, consisting of pieces by M. Rossini, arranged by M. Berettoni.'
"I request that this alteration may appear in the bills of to-morrow, in default of which I shall be obliged to ask from justice what I now ask from your good faith.