Strabo, Geography

But the boundaries of these parts have been so confused with one another, as I have often said,¹ that it is uncertain even as to the country round Mt. Sipylus, which the ancients called Phrygia, whether it was a part of Greater Phrygia or of Lesser Phrygia, where lived, they say, the "Phrygian" Tantalus and Pelops and Niobe. But no matter which of the two opinions is correct, the confusion of the boundaries is obvious; for Pergamene and Elaïtis, where the Caïcus empties into the sea, and Teuthrania, situated between these two countries, where Teuthras lived and where Telephus was reared, lie between the Hellespont on the one side and the country round Sipylus and Magnesia, which lies at the foot of Sipylus, on the other; and therefore, as I have said before, it is a task to determine the boundaries (“
Apart are the boundaries of the Mysians and Phrygians
”).²