Annoyed by his persistent wooing, the goddess, to escape him, assumed the form of a mare; but the God of the Sea, not at all deceived by this stratagem, straightway assumed the form of a horse, in which guise he contentedly trotted after her and renewed his attentions. […] On another occasion, Boreas, having changed himself into a horse and united himself to the mares of Dardanus, King of Troy, became the father of twelve steeds so swift that none could overtake them.