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On the landward side the boundaries are a part of Mauritania lying against western Ethiopia and the remainder of Africa (having a very warm climate, or much infested with wild beasts) extending to eastern Ethiopia. These are the Roman boundaries in Africa. Those of Asia are the river Euphrates, Mount Caucasus, the kingdom of Greater Armenia, the Colchians who dwell along the Euxine sea, and the remainder of that coast. In Europe the two rivers, Rhine and Danube, for the most part bound the Roman empire. Of these the Rhine empties into the The Roman Empire at the Time of Hadrian Northern ocean and the Danube into the Euxine. On the other side of these rivers, however, some of the Celts beyond the Rhine are under Roman sway, and beyond the Danube some of the Getae, who are called Dacians. These, with the nearest approach to accuracy, are the boundaries on the mainland.
