Leda (mythology) and by him, mother of Helen of Troy, Clytemnestra, and Castor and Pollux (also spelled "Castor and Polydeuces"). Leda also had other daughters by Tyndareus: Timandra, Phoebe, and Philonoe. Leda was admired by Zeus, who seduced her in the guise of a swan. As a swan, Zeus fell into her arms for protection from a pursuing eagle. Their consummation, on the same night as Leda lay with her husband Tyndareus, resulted in two eggs from which hatched Helen (later known as the beautiful "Helen of Troy"), Clytemnestra, and Castor and Pollux (also known as the Dioscuri). Which children are the
Castor et Pollux Pollux is resolute. The stage shows the entrance to the Underworld, guarded by monsters and demons. Phoebe gathers the Spartans to prevent Pollux from entering the gate of the Underworld. Pollux refuses to be dissuaded, even though Phoebe declares her love for him. When Telaira arrives and she sees Pollux's passion for her, Phoebe realises her love will be unrequited. She urges the demons of the Underworld to stop him entering ("Sortez, sortez d'esclavage/Combattez, Démons furieux"). Pollux fights the demons with the help of the god Mercury and descends into Hades. The scene shows the Elysian fields in the Underworld.