Although perhaps made explicit in the "Prometheia", later authors such as Hyginus, the "Bibliotheca", and Quintus of Smyrna would confirm that Prometheus warned Zeus not to marry the sea nymph Thetis. She is consequently married off to the mortal Peleus, and bears him a son greater than the father – Achilles, Greek hero of the Trojan War. Pseudo-Apollodorus moreover clarifies a cryptic statement (1026–29) made by Hermes in "Prometheus Bound", identifying the centaur Chiron as the one who would take on Prometheus' suffering and die in his place. Reflecting a myth attested in Greek vase paintings from the Classical period, Pseudo-Apollodorus places the Titan (armed with an axe) at the birth of Athena, thus explaining how the goddess sprang forth from the forehead of Zeus.