reservations: the piece was set in the market of Les Halles, which was the setting for Charles Lecocq's opéra comique La fille de Madame Angot, written fifty years earlier but still immensely popular. Furthermore, the heroine was called Ciboulette, meaning "chives", which Hahn thought unromantic, and the most interesting character was neither the heroine nor the hero, but their mentor, "a sort of elderly Rodolfo out of La bohème". Nonetheless, Hahn accepted the invitation. Between the start of work on Ciboulette and its premiere, Hahn lost his two closest friends. Proust died in November 1922 and Bernhardt the following March. He pressed on with work, and in April 1923 Ciboulette opened at the Théâtre des Variétés. It was well reviewed and was an enormous box office success. It was revived in Paris several times during Hahn's lifetime, and has remained in the repertoire in France, with 21st-century revivals at the Opéra-Comique and elsewhere. In 1924 Hahn was promoted to officer in the Legion of Honour. The following year he had the second big success of his theatrical career. The actor and playwright Sacha Guitry invited him to write the music for a new comédie musicale called Mozart. The piece was loosely based on the early life of the composer, and was to star Guitry and his wife, Yvonne Printemps, the latter en travesti as the young Mozart. Hahn agreed, and composed a score incorporating various extracts from Mozart's works along with his own original music. The show opened in December 1925 at the Théâtre Édouard VII, receiving enthusiastic reviews: Messager, writing in Le Figaro, called it "a piece of rare quality", and commented that the score was so good that it was hard to detect where Mozart's music ended and Hahn's began: this, he said, was the highest possible praise. The show was a popular success in Paris, with, for the time, an excellent run of seven months. The Guitrys then took the production to London in 1926, where it was well received. At the end of that year there were two versions running on Broadway: the Guitry company played the French original for a limited season, and an English translation ran at another theatre, starring Frank Cellier and Irene Bordoni. 1930 to 1947 In 1930 Hahn composed a piano concerto, premiered in February 1931 with its dedicatee, Magda Tagliaferro, as soloist and the composer conducting; according to Grove it