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 descending tetrachord motive associated with lamentation since Claudio Monteverdi's "Nymph's Lament" (in this case it is chromatic: F-E-Eb-D-Db-C). Although Telaira's "Tristes apprêts" in scene 3 does not have the descending tetrachord feature, Cuthbert Girdlestone still calls it a lament. The air is in da capo form, whose B-section has a recitative-like quality. It features a bassoon obbligato part and a high register outburst on the word "Non!" that marks its high point. The march music for the entrance of Pollux and the Spartans is martial in character. With Lynceus's corpse at his feet, Pollux proclaims his brother avenged; the Spartans