Strabo, Geography 6.3.5
First, to the small town of Baris, six hundred stadia; Baris is called by the people of to‑day Veretum, is situated at the edge of the Salentine territory, and the trip thither from Taras is for the most part easier to make on foot than by sailing. Thence to Leuca eighty stadia; this, too, is a small town, and in it is to be seen a fountain of malodorous water; the mythical story is told that those of the Giants who survived at the Campanian Phlegra and are called the Leuternian Giants were driven out by Heracles, and on fleeing hither for refuge were shrouded by Mother Earth, and the fountain gets its malodorous stream from the ichor of their bodies; and for this reason, also, the seaboard here is called Leuternia.
Strabo, Geography 6.3.9
From Barium to the Aufidus River, on which is the Emporium of the Canusitae is four hundred stadia and the voyage inland to Emporium is ninety. Near by is also Salapia, the seaport of the Argyrippini. For not far above the sea (in the plain, at all events) are situated two cities, Canusium and Argyrippa, which in earlier times were the largest of the Italiote cities, as is clear from the circuits of their walls. Now, however, Argyrippa is smaller; it was called Argos Hippium at first, then Argyrippa, and then by the present name Arpi. Both are said to have been founded by Diomedes. And as signs of the dominion of Diomedes in these regions are to be seen the Plain of Diomedes and many other things, among which are the old votive offerings in the temple of Athene at Luceria — a place which likewise was in ancient times a city of the Daunii, but is now reduced — and, in the sea near by, two islands that are called the Islands of Diomedes, of which one is inhabited, while the other, it is said, is desert; on the latter, according to certain narrators of myths, Diomedes was caused to disappear, and his companions were changed to birds, and to this day, in fact, remain tame and live a sort of human life, not only in their orderly ways but also in their tameness towards honorable men and in their flight from wicked and knavish men. But I have already mentioned the stories constantly told among the Heneti about this hero and the rites which are observed in his honour.