Pausanias, who traveled throughout Greece, Italy, and Palestine, wrote a travel guide to Greece in the second century C.E. In the work, titled Periegesis tes Helladps ("Description of Greece"), Pausanias gives an histprical and topographical overview of Greece, describing landmarks as a modern tour guide might. In the first of ten books, Pausanias explores Attica. Here he uses mythology to identify a river:

The rivers that flow through Athenian territory are the Ilisus and its tributary the Eridanus, whose name is the same as that of the Celtic River. This Ilisus is the river by which Oreithyia was playing when, according to the story, she was carried off by the North Wind. With Oreithyia he lived in wedlock, and because of ties between him and the Athenians he helped them by destroying most of the foreigners warships. The Athenians hold...