Strabo, Geography

Of Phocis two cities are the most famous, Delphi and Elateia. Delphi, because of the temple of the Pythian Apollo, and because of the oracle, which is ancient, since Agamemnon is said by the poet to have had an oracle given him from there; for the minstrel is introduced as singing “"the quarrel of Odysseus and Achilles, son of Peleus, how once they strove . . ., and Agamemnon, lord of men, rejoiced at heart . . ., for thus Phoebus Apollo, in giving response to him at Pytho, had told him that it should be."
”¹Delphi, I say, is famous because of these things, but Elateia, because it is the largest of all the cities there, and has the most advantageous position, because it is situated in the narrow passes and because he who holds this city holds the passes leading into Phocis and Boeotia. For, first, there are the Oetaean Mountains; and then those of the Locrians and Phocians, which are not everywhere passable to invaders from Thessaly, but have passes, both narrow and separated from one another, which are guarded by the adjacent cities; and the result is, that when these cities are captured, their captors master the passes also. But since the fame of the temple at Delphi has the priority of age, and since at the same time the position of its places suggests a natural beginning (for these are the most westerly parts of Phocis), I should begin my description there.