Note 122 — Chapter LXX · RETREAT OF THE TEN THOUSAND GREEKS.
Reading edition
There seems reason to believe that in ancient times the Tigris, above Bagdad, followed a course more to the westward, and less winding, than it does now. The situation of Opis cannot be verified. The ruins of a large city were seen by Captain Lynch near the confluence of the river Adhem with the Tigris, which he supposed to be Opis, in lat. 34°.