 During this period in Paris, Verdi was to work on and complete the score for "Jérusalem".From Paris, he fulfilled the obligation to write and oversee the production of "Il corsaro" from a libretto by Francesco Maria Piave which took place in Trieste in October 1848.Also, he worked with Salvadore Cammarano on two librettos, one for "La battaglia di Legnano" (then attend its January 1849 Rome premiere), the other being "Luisa Miller" which was presented in Naples in December 1849 after Verdi's return to Italy.