Laomedon, the founder of Troy, who persuaded Apollo and Neptune to assist him in building the walls, but refused the recompense when the work was finished, in consequence of which the latter sent a monster to ravage the country, which could be propitiated only by the annual sacrifice to it of a young maid, till one year the lot fell on Hermione, the king's daughter, when Hercules, persuaded by the king, slew the monster and delivered the maiden.