But Cepheus arose and cried:
"Brother, art thou mad? Thou didst lose thy bride when she was given up to death before thy face. Why didst thou not then win back the prize? Leave her now to him who fought for her and saved her."
Phineus held his peace, but cast furious looks both at his brother and at Perseus, as if hesitating which to strike first. Finally, with all his might, he threw a spear at Perseus, but missed the mark. This was the signal for a general combat between the guests and servants of Cepheus and Phineus and his followers. The latter were the more numerous, and at last Perseus was quite surrounded by enemies. He fought valiantly, however, striking down his opponents one after another, until he saw that he could not hold out to the end against such odds. Then he made up his mind to use his last, but surest, means of defense, and crying, "Let those who are my friends turn away their faces," he drew forth the head of Medusa and held it toward his nearest adversary.
"Seek thou others," cried the warrior, "whom thou mayst frighten with thy miracles!"
But in the very act of lifting his spear he grew stiff and motionless as a statue. The same fate came upon all who followed, till at last Phineus repented of his unjust conduct. All about him he saw nothing but stone images in every conceivable posture. He called despairingly upon his friends and laid hands on those near him; but all were silent, cold and stony. Then fear and sorrow seized him, and his threats changed to prayers.
"Spare me—spare my life!" he cried to Perseus, "and bride and kingdom shall be thine!"
But Perseus was not to be moved to mercy, for his friends had been killed before his very face. So Phineus shared the doom of his followers and was turned to stone.
After these events Perseus and Andromeda were married, and together they journeyed to Seriphos, where they heard that the king had been ill-treating Danaë. When, therefore, the tyrant assembled his court to see how Perseus had done his task, the son avenged his mother's wrongs by petrifying the assemblage—king, courtiers and all! Then he gave back to the nymphs the helmet, shoes and pouch they had lent to him, returned the knife to Mercury, and presented Minerva with Medusa's head, which ever after she wore upon her shield.
With his mother and his wife Perseus then sought his timid grandfather Acrisius, and found him, not in his own realm of Argos, but at Larisa, the city of King Teutamias, looking on at some public games. Perseus must needs meddle in the exercises, and so managed to fulfill the old prophecy and accidentally slay his grandfather by an unlucky throw of the discus, a kind of flat quoit.
Perseus, who deeply mourned his grandfather's fate, soon exchanged the kingdom of Argos for Tiryns, and there founded the city of Mycenæ. He lived very happily with his wife, and ruled his kingdom long and wisely.