Thence flow both rivers, I mean the Euphrates and the Tigris, which encircle Mesopotamia and closely approach each other in Babylonia and then empty into the Persian Sea. The Euphrates is not only the larger of the two rivers, but also, with its winding stream, traverses more country, having its sources in the northerly region of the Taurus, and flowing towards the west through Greater Armenia, as it is called, to Lesser Armenia, having the latter on its right and Acilisene on the left. It then bends towards the south, and at its bend joins the boundaries of Cappadocia; and leaving these and the region of Commagene on the right, and Acilisene and Sophene in Greater Armenia on the left, it runs on to Syria and again makes another bend into Babylonia and the Persian Gulf. The Tigris, running from the southerly part of the same mountain to Seleuceia, approaches close to the Euphrates and with it forms Mesopotamia, and then flows into the same gulf as the Euphrates. The sources of the Euphrates and the Tigris are about two thousand five hundred stadia distant from each other.