Traditions on early migrations, which have originated in the people to which they refer and bear the imprint of genuineness, not that of a late fabrication by conjurers or mixed-bloods, usually contain indications of importance which are confirmed by archæologic and linguistic researches. The tradition of the Hebrews, which tells of their immigration into Palestine from the countries of the north across the Euphrates, is substantiated by their tribal name _ibri_ "one who has crossed." The Hellenic, especially Doric tradition of an immigration from Thrace and Macedonia through Epirus and Thessalia into Greece is confirmed by linguistic and historic facts, but the Roman legend concerning the descent of the founders of the "Eternal City" from Troy was acknowledged to be a pious fraud by the ancients themselves.