For Zeus imparted to them tireless strength; but without Zeus they could not have followed, for the Harpies used ever to outstrip the blasts of the west wind when they came to Phineus and when they left him.

And as when, upon the mountain-side, hounds, cunning in the chase, run in the track of horned goats or deer, and as they strain a little behind gnash their teeth upon the edge of their jaws in vain; so Zetes and Calais rushing very near just grazed the Harpies in vain with their finger-tips.

And assuredly they would have torn them to pieces, despite heaven's will, when they had overtaken them far off at the Floating Islands, had not swift Iris seen them and leapt down from the sky from heaven above, and checked them with these words: "It is not lawful, O sons of Boreas, to strike with your swords the Harpies, the hounds of mighty Zeus; but I myself will give you a pledge, that hereafter they shall not draw near to Phineus." With these words she took an oath by the waters of Styx, which to all the gods is most dread and most awful, that the Harpies would never thereafter again approach the home of Phineus, son of Agenor, for so it was fated.

And the heroes yielding to the oath, turned back their flight to the ship.

And on account of this men call them the Islands of Turning though aforetime they called them the Floating Islands.