Then again you are doubtless well aware that possessions, whether private or public, when they have remained for a long time in the hands of their owner, are by all men acknowledged to be hereditary and incontestable. Now we took Messene before the Persians acquired their kingdomIn 559 B.C., when Cyrus became ruler of Persia. and became masters of the continent, in fact before a number of the Hellenic cities were even founded.