Complex sentence: But neither Homer nor Hesiod say anything more about where this Arima might be, and whether an actual or mythical place was meant, and if actual, its possible location, has been, since ancient times, the subject of much speculation and debate.
Split into simpler sentences: But neither Homer nor Hesiod say anything more about where this Arima might be. The question of whether an actual (as oppossed to a mythical) place was meant, and if so, its possible location, has been, since ancient times, the subject of much speculation and debate.