Geography : The island of Britain forms an irregular triangle, and is bounded by the German Ocean, S by the Straits of Dover and the English Channel, by St Georges Channel, the Irish Sea, North Channel, and the Atlantic Ocean.

It falls into three geographical divisions, corresponding somewhat to the later political divisions.

I The extreme north, beyond the deep indentations of the Frith of Clyde and the Frith of Forth, is mountainous and barren, with numer- ous small lakes (Loch Ness, Loch Tay, Loch Lomond), and sharply cut coasts on the west II The southern and eastern portion : hilly in the N and ; on the a broad plain, well watered and fertile.

Eastern rivers : Number (Ouse, Trent), Witham, Welland, Nen, Ouse, running through a broad fen-land into the Wash, Thames.

Western rivers : Severn, Mersey.