BRITAIN is triangular in form; its longest side lies parallel to Keltica, in length neither exceeding nor falling short of it; for each of then extends as much as 4300 or 4400 stadia: the side of Keltica extending from the mouths of the Rhine to the northern extremities of the Pyrenees towards Aquitaine; and that of Britain, which commences at Kent, its most eastern point, opposite the mouths of the Rhine, extending to the western extremity of the island, which lies over against Aquitaine and the Pyrenees. This is the shortest line from the Pyrenees to the Rhine; the longest is said to be 5000 stadia; but it is likely that there is some convergency of the river towards the mountain from a strictly parallel position, there being an inclination of either toward the other at the extremities next the ocean.
