(3) Lexicographers, such as Harpocration, Pollux, Hesychius, Suidas, and the compiler of the Etymologicum Magnum, many of whom are of uncertain date, and to a great extent based upon one another.
Plato's law that 'when a man makes an agreement which he does not fulfil, unless the agreement be of a nature which the law or a vote of the assembly does not allow, or which he has made under the influence of some unjust compulsion, or which he is prevented from fulfilling against his will by some unexpected chance,—the other party may go to law with him,' according to Pollux (quoted in Telfy's note) prevailed also at Athens.
The heroes who joined Jason became known as the Argonauts, and they included some of the most famous figures in Greek mythology: Hercules, Orpheus, Castor and Pollux, Atalanta, and many others.
Pollux and Herakles were great friends, Pollux having saved the life of Herakles in a foray, at the imminent risk of his own.