his daughter Andromeda set out as food for a sea-monster (ke¯tos). For
Cassiepeia, the wife of Cepheus, had competed with the Nereids in beauty and
had boasted that she was better than all of them. As a result of this the Nereids
became angry and Poseidon, coming to share their anger, sent a flood-tide
against the land, and the sea-monster too. Ammon gave a prophecy of deliver-
ance from the misfortune, if Andromeda, the daughter of Cassiepeia, were given
to the monster to eat. Cepheus did this under compulsion from the Ethiopians,
and bound his daughter to a rock. Perseus, seeing her and falling in love with
her, promised to kill the monster for Cepheus, if he would give him the girl to
wife, once he had saved her. Oaths were sworn to this effect, and Perseus faced
the monster, killed it and released Andromeda. But Phineus plotted against him.
He was Cepheus’ brother, and had formerly had Andromeda betrothed to him.
Perseus discovered the plot, showed him and his fellow conspirators the head of
the Gorgon and turned him to stone in an instant.
(Apollodorus Bibliotheca 2.4.3.)
When Perseus arrived at Seriphos he came before Polydectes and bade him
gather the people, so that he might show them the Gorgon’s head, in the know-
ledge that when they saw it they would be turned to stone. Polydectes
assembled the people and bade him show the head. He turned away, took it out
of his pouch, and showed it. The people saw it and were turned to stone. Athena
took the head from Perseus and mounted it upon her goatskin (aegis). He gave
the pouch back to Hermes, and his sandals and cap to the Nymphs.
(Pherecydes FGH 3 fr. 26 = fr. 11, second part, Fowler)
After the petrifaction of Polydectes and his companions, Perseus left Dictys in
Seriphos to rule over the remaining Seriphians, but Perseus himself sailed to
Argos with the Cyclopes, Danae and Andromeda. He failed to find Acrisius in
Argos upon his arrival, for he had withdrawn to the Pelasgians in Larissa for fear.
After failing to apprehend him, Perseus left Danae with her mother Eurydice,
and so too Andromeda and the Cyclopes. But he himself went to Larissa. Upon
arrival he recognised Acrisius and persuaded him to follow him back to Argos.
When they were on the point of departure, he came across a competition for
young men in Larissa. Perseus stripped off for the competition, took the discus,
and threw it. The pentathlon did not yet exist, but people competed separately in
each of the competitions. The discus swerved into Acrisius’ foot and wounded
him. Acrisius fell sick as a result of this and died there in Larissa. Perseus and
6 WHY PERSEUS?