Book 1
17.3
The painting on the third wall is not intelligible to those unfamiliar with the traditions, partly through age and partly because Micon has not represented in the picture the whole of the legend. When Minos was taking Theseus and the rest of the company of young folk to Crete he fell in love with Periboea, and on meeting with determined opposition from Theseus, hurled insults at him and denied that he was a son of Poseidon, since he could not recover for him the signet-ring, which he happened to be wearing, if he threw it into the sea. With these words Minos is said to have thrown the ring, but they say that Theseus came up from the sea with that ring and also with a gold crown that Amphitrite gave him.
17.4
The accounts of the end of Theseus are many and inconsistent. They say he was kept a prisoner until Heracles restored him to the light of day, but the most plausible account I have heard is this. Theseus invaded Thesprotia to carry off the wife of the Thesprotian king, and in this way lost the greater part of his army, and both he and Peirithous (he too was taking part in the expedition, being eager for the marriage) were taken captive. The Thesprotian king kept them prisoners at Cichyrus.