This once established as regards the whole earth, it remains for me to lay before my readers the division on the same principle of that portion of the world known to us.
This is divided into three parts, each with its name, the one part being called Asia, the second <a class="linkToPlace" target="_blank" href="/place?placename=Africa&groupId=300&placeId=294">Africa</a>, and the third Europe.
Their respective boundaries are the river <a class="linkToPlace" target="_blank" href="/place?placename=Don&groupId=127&placeId=365">Don</a>, the <a class="linkToPlace" target="_blank" href="/place?placename=Nile&groupId=794&placeId=449">Nile</a>, and the straits at the Pillars of Hercules.
Asia lies between the <a class="linkToPlace" target="_blank" href="/place?placename=Nile&groupId=794&placeId=449">Nile</a> and <a class="linkToPlace" target="_blank" href="/place?placename=Don&groupId=127&placeId=365">Don</a> and falls under that portion of the heaven lying between the north-east and the south.
<a class="linkToPlace" target="_blank" href="/place?placename=Africa&groupId=300&placeId=294">Africa</a> lies between the <a class="linkToPlace" target="_blank" href="/place?placename=Nile&groupId=794&placeId=449">Nile</a> and the Pillars of Hercules, and it falls under the south to the south-west and west, as far as the point of the equinoctial sunset, in which latter quarter are the Pillars of Hercules.
These two divisions of the earth, then, regarded from a general point of view, occupy the part of it which lies to the south of the Mediterranean, reaching from east to west, its most compact and deepest portion lying due north between the <a class="linkToPlace" target="_blank" href="/place?placename=Don&groupId=127&placeId=365">Don</a> and the <a class="linkToPlace" target="_blank" href="/place?placename=Narbo&groupId=786&placeId=1423">Narbo</a>, the latter river being not far to the west of Marseilles and of the mouths by which the <a class="linkToPlace" target="_blank" href="/place?placename=Rhone&groupId=933&placeId=1667">Rhone</a> discharges itself into the Sardinian Sea.
The Celts inhabit the country near the <a class="linkToPlace" target="_blank" href="/place?placename=Narbo&groupId=786&placeId=1423">Narbo</a> and beyond it as far as the chain of the <a class="linkToPlace" target="_blank" href="/place?placename=Pyrenees&groupId=921&placeId=1650">Pyrenees</a> which stretches in an unbroken remaining part of Europe beyond the <a class="linkToPlace" target="_blank" href="/place?placename=Pyrenees&groupId=921&placeId=1650">Pyrenees</a> reaching to its western end and to the Pillars of Hercules is bounded on the one side by the Mediterranean and on the other by the Outer Sea, that portion of which is washed by the Mediterranean as far as the Pillars of Hercules being called Iberia, while that part which lies along the Outer or Great Sea has no general name, as it has only recently come under notice, but is all densely inhabited by barbarous tribes of whom I shall speak more particularly on a subsequent occasion.
Walbank Commentary