CHAPTER II IMPORTANT FACTORS AFFECTING THE HISTORY OF YORK A. GEOGRAPHICAL POSITION AMONG the factors affecting this particular city geographical position is evidently the most important. It is to this, combined with the con- sequent military value of the site, that York owes its origin as a city, its importance in the Middle Ages, and its practical importance to-day. York, which is the natural centre for the North of England, is the halfway house between London and Edinburgh, and is on the shortest and quickest land or air route, however the journey is made, between these two capitals. The Ouse and Humber have enabled it always to be within navigable distance of the North-East coast. The city itself is situated on an advantageous site in the centre of a great plain, the north and south ends of which are open. The surrounding hills and valleys are so disposed that a large number of rivers radiate towards the centre of the plain. Civilisation—if we must rank the ultra-fierce Norsemen, for instance, among its exponents—proceeded westwards from the coast, and wave after wave of the invading peoples crossed with ease the eastern and north-eastern hills, which are far less formidable than those on the west. York was already an important place in the days of. ' ' ' ' '