Strabo, Geography
H.C. Hamilton, Esq., W. Falconer, M.A., Ed.

According to Nearchus, the sea-coast of Susis is swampy, and terminates at the river Euphrates; at its mouth is a village, which receives the merchandise from Arabia; for the coast of Arabia approaches close to the mouths of the Euphrates and the Pasitigris; the whole intermediate space is occupied by a lake which receives the Tigris; on sailing up the Pasitigris 150 stadia is the bridge of rafts leading to Susa from Persis, and is distant from Susa 60 (600?) stadia; the Pasitigris is distant from the Oroatis about 2000 stadia; the ascent through the lake to the mouth of the Tigris is 600 (6000?) stadia;¹ near the mouth stands the Susian village (Aginis), distant from Susa 500 stadia; the journey by water from the mouth of the Euphrates, up to Babylon, through a well-inhabited tract of country, is a distance of more than 3000 stadia.

Onesicritus says that all the rivers discharge themselves into the lake, both the Euphrates and the Tigris; and that the Euphrates, again issuing from the lake, discharges itself into the sea by a separate mouth.