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156 invoke you, Asvins, sons of the sky." They are addressed as young, beautiful, fleet, and the foes of evil spirits. There can be no doubt that, when the Vedas were composed, the Asvins shone and wavered and were eclipsed among the bright and cloudy throng of gods, then contemplated by the Rishis or sacred singers. Whether they had from the beginning an elemental origin, and what that origin exactly was, or whether they were merely endowed by the fancy of poets with various elemental and solar attributes and functions, it may be impossible to ascertain. Their legend, meanwhile, is replete with features familiar in other mythologies. As to their birth, the Rig-Veda has the following singular anecdote, which reminds one of the cloud-bride of Ixion, and of the woman of clouds and shadows that was substituted for Helen of Troy: —"Tvashtri makes a wedding for his daughter. Hearing this, the whole world assembled. The mother of Yama, the wedded wife of the great Vivasvat, disappeared. They concealed the immortal bride from mortals. Making another of like appearance, they gave her to Vivasvat. Saranyu bore the two Asvins, and when she had done so, deserted the twins." The old commentators explain by a legend in which the daughter of Tvashtri, Saranyu, took on the shape of a mare. Vivasvat followed her in the form of a horse, and she became the mother of the Asvins, "sons of the horse," who more or less correspond to Castor and Pollux,