As there may be no occasion to refer to this mystery later, it is as well to point out at once the dual meaning contained in the Greek myth bearing upon this particular phase of evolution. It is found in the several variants of the allegory of Leda and her two sons Castor and Pollux, each of which variants has a special meaning. Thus in Book XI of the _Odyssey_, Leda is spoken of as the spouse of Tyndarus, who gave birth by her husband “to two sons of valiant heart”—Castor and Pollux. Jupiter endows them with a marvellous gift and privilege. They are semi‐immortal; they live and die, each in turn, and every alternate day (ἑτερήμεροι(275)). As the Tyndaridæ, the twin brothers are an astronomical symbol, and stand for Day and Night; their two wives, Phœbe and Hilaeira, the daughters of Apollo or the Sun, personifying the Dawn and the Twilight.(276) Again, in the allegory where Zeus is shown as the father of the two heroes—born from the Egg to which Leda gives birth—the myth is entirely theogonical. It relates to that group of cosmic allegories in which the world is described as born from an Egg. For Leda assumes in it the shape of a white swan, when uniting herself to the Divine Swan or Brahma‐Kalahamsa. Leda is the mythical Bird, then, to which, in the traditions of various peoples of the Âryan race, are attributed various ornithological forms of birds which all lay golden Eggs.(277) In the _Kalevala_, the Epic Poem of Finland, the beauteous daughter of the Ether, the “Water‐Mother,” creates the World in conjunction with a “Duck”—another form of the Swan or Goose, Kalahamsa—who lays six golden eggs, and the seventh, an “egg of iron,” in her lap. But the variant of the Leda allegory which has a direct reference to mystic man is found in Pindar(278) only, with a slighter reference to it in the Homeric Hymns.(279) Castor and Pollux are in it no longer the Dioscuri of Apollodorus(280); but become the highly significant symbol of the dual man, the Mortal and the Immortal. Not only this, but as will now be seen, they are also the symbol of the Third Race, and its transformation from the Animal‐man into a God‐man with only an animal body.