After some time had passed he also won Frogertha; but, while going back to his own country, he had a bad voyage, and was driven on the shores of an unknown island.

A certain man appeared to him in a vision, and instructed him to dig up a treasure that was buried in the ground, and also to attack the dragon that guarded it, covering himself in an ox-hide to escape the poison; teaching him also to meet the envenomed fangs with a hide stretched over his shield.

Therefore, to test the vision, he attacked the snake as it rose out of the waves, and for a long time cast spears against its scaly side; in vain, for its hard and shelly body foiled the darts flung at it.

But the snake, shaking its mass of coils, uprooted the trees which it brushed past by winding its tail about them.

Moreover, by constantly dragging its body, it hollowed the ground down to the solid rock, and had made a sheer bank on either hand, just as in some places we see hills parted by an intervening valley.