(_a_) It is isolated, its mountains being surrounded by the sea, or
rising sharply from the plains. It is part of the range of mountains
which runs along the whole of the west coast of Britain; but the range
is broken at the mouth of the Severn and at the mouth of the Dee.
(_b_) It is divided, its valleys and roads radiating in all
directions. So we have in its history
A. Wars of Independence.
B. Civil War.