in the mountains (Air: "Dans ce riant séjour le divin Tirésie"). Neptune follows her and continues his wooing (Air: "L'Amour, dont je bravais l'empire") but Naïs is fearful and asks him to leave. Once alone, she confesses she is in love with the stranger (Ariette: "Ces rapides traits de flamme"). Télénus arrives and apologises for his earlier behaviour her; Naïs tells him to stop being jealous (Air vif: "La jalousie a des fureurs"). Télénus believes that he can sense a change in Naïs and there is hope for his love (Air: "Cessez, soupçons jaloux, cessez de m'alarmer"). Astérion is also in love with Naïs (Air: "Les ennuis de l'incertitude"). He arrives with his band of shepherds and shepherdesses to ask Tirésie to prophesy who Naïs will marry. The shepherds and shepherdesses charm Tirésie with their pastoral music and dancing. A shepherdess asks the seer whether she will be happy in love (Air: "Je ne sais quel ennui me presse") and he replies in the affirmative. Tirésie begins to interpret the song of the birds: he tells his listeners to beware of the wrath of the god of the sea and that Naïs will find true love. Astérion and Télénus decide that the oracle means they must sacrifice the life of their rival to appease Neptune (Chorus: "Aux armes, vengeons-nous"). Act 3 Scene: The foreground shows a promontory whose base is washed by the sea. Both sides of the stage are covered with orange trees, myrtles and lemon trees. The background shows the sea and the horizon. The shining boats which appeared during the Isthmian Games are visible in the harbour. The act begins as night is coming to an end and the stage is lit by an indistinct light during the first scene. As the sun rises, Neptune waits for Naïs (Air: "Mais déjà l'horizon s'éclaire"). She arrives to warn him that the Corinthians are threatening to kill him but Neptune says he is not afraid of anyone (Air: "Que l'univers entière me déclare la guerre"). Télénus and Astérion appear with a band of armed followers and burning torches ("Allumez-vous rapides feux"). They try to set fire to the sea gods' ships but huge waves overwhelm them. Naïs is terrified but Neptune finally reveals his true identity and his love for her. The earth opens and the scene changes to Neptune's underwater palace. The sea gods hymn Neptune (Chorus: "Coulez