 He taught singing to the Bourbon princesses Maria Teresa and Luisa Maria, and to Emma Hamilton, not yet the lover of Lord Nelson.During this time at Naples, he composed eight operas that are confirmed as being his work, nearly all of which premiered in Naples — two to libretti by Metastasio and one to words by Ranieri de' Calzabigi, Gluck's librettist for all three of his Italian reform operas.The published score of Millico's opera "La pietà d’amore" includes a message of support for Gluck's attempted reforms of "opera seria".