The theater ran up to 15 opera productions a year, including local premieres of Beethoven's Fidelio and Verdi's Ernani, Macbeth, Il Trovatore and Othello.
A program for the Ernani performance at the Howard is owned by the Boston Athenæum, which has a very small but interesting collection of programs from the Howard's early years dating from 1847 to 1848.
Her most prominent performances were as the title character in Gaetano Donizetti's Maria Padilla (Milan, 1841), as Elvira in Giuseppe Verdi's Ernani (Venice, 1844), and as Odabella in Verdi's Attila (Venice, 1846).