They tell him that Alfonso has escaped and that they are resolved to overtake and kill him. Fenella, who hears all, decides to save her lover. At this moment Alfonso begs at her door for a hiding-place. He enters with Elvire, and Fenella, though at first disposed to avenge herself on her rival, pardons her for Alfonso's sake. Masaniello, reentering, assures the strangers of his protection and even when Pietro denounces Alfonso as the Viceroy's son, he holds his promise sacred. Pietro with his fellow-conspirators leaves him full of rage and hatred.