exactly how much Bellini or Florimo contributed to the revisions, and Weinstock asserts that no performances were ever given after 1825, but in March 1829, we find Bellini writing to Florimo that "I have written you the changes that you should make in Adelson ". In the summer or early autumn of 1825 Bellini began work on what was to become his first professionally produced opera. A contract between the Conservatory and the royal theatres obliged the Conservatory—when it nominated a sufficiently talented student—to require that student to write a cantata or one-act opera to be presented on a gala evening in one of the theatres. After Zingarelli used his influence to secure this honour for his promising student, Bellini was able to obtain agreement that he could write a full-length opera and, furthermore, that the libretto did not have to be written by Tottola, the theatres' official dramatic poet. However, as Intendant of the San Carlo, "Barbaja was the chief beneficiary: 'With a small investment he found among those young men the one who would lead him to large profits'" notes Florimo. Bianca e Gernando The young composer chose Domenico Gilardoni, a young writer who then prepared his first libretto, which he named Bianca e Fernando, based on an 1820 play, Bianca e Fernando alla tomba di Carlo IV, Duca d'Agrigento and set in Sicily. However, the title Bianca e Fernando had to be changed, because Ferdinando was the name of the heir to the throne, and no form of it could be used on a royal stage. After some delays caused by King Francesco I forcing postponement, the opera—now named Bianca e Gernando—was given its premiere performance at the Teatro di San Carlo on 30 May 1826, Prince Ferdinando's name day. It was very successful, helped by the approval of the King, who broke the custom of there being no applause at a performance attended by royalty. It was also attended by Donizetti who enthusiastically wrote to Simon Mayr: "It is beautiful, beautiful, beautiful, especially as it is his first opera." Bellini's music was highly regarded, with the Giornale delle Due Sicilie on 13 June noting that "[several of the arias and duets] are some of the most laudable pieces of new music heard in recent times at the [San Carlo]." However, there were reservations about Gilardoni's contribution. Within nine months, in February/March 1827, Domenico Barbaja offered Bellini