[Sidenote: Migrations of the male descendants of Tydeus and Pelops.] Again, Tydeus was a son of Oeneus, the King of Calydon in Aetolia, but he went to Argos and married the king’s daughter.[901] His son Diomede migrated to Daunia in Italy, where he helped the king in a war with his enemies, receiving as his reward the king’s daughter in marriage and part of the kingdom.[902] As another example we may take the family of the Pelopidae, whose tragic fortunes the Greek poets never wearied of celebrating. Their ancestor was Tantalus, King of Sipylus in Asia Minor. But his son Pelops passed into Greece, won Hippodamia, the daughter of the King of Pisa, in the famous chariot-race, and succeeded his father-in-law on the throne.[903] His son Atreus did not remain in Pisa, but migrated to Mycenae, of which he became king;[904] and in the next generation Menelaus, son of Atreus, went to Sparta, where he married Helen, the king’s daughter, and himself reigned over the country.[905] Further, it is very notable that, according to the old lyric poets, Agamemnon himself, the elder brother of Menelaus, reigned not at Mycenae but in Lacedaemon, the native land of his wife Clytaemnestra, and that he was buried at Amyclae, the ancient capital of the country.[906] [Sidenote: These migrations not understood in later times.] Various reasons are assigned by ancient Greek writers for these migrations of the princes. A common one is that the king’s son had been banished for murder. This would explain very well why he fled his own land, but it is no reason at all why he should become king of another. We may suspect that such reasons are afterthoughts devised by writers who, accustomed to the rule that a son should succeed to his father’s property and kingdom, were hard put to it to account for so many traditions of kings’ sons who quitted the land of their birth to reign over a foreign kingdom. [Sidenote: Traces of similar migrations in Scandinavian tradition.] In Scandinavian tradition we meet with traces of similar customs. For we read of daughters’ husbands who received a share of the kingdoms of their royal fathers-in-law, even when these fathers-in-law had sons of their own; in particular, during the five generations which preceded Harold the Fair-haired, male members of the Ynglingar family, which is said to have come from Sweden, are reported in the _Heimskringla_ or _Sagas of the Norwegian_ Kings to have obtained at least six provinces in Norway by marriage with the daughters of the local kings.[907]