Among the factors affecting this particular city geographical position is evidently the most important.  It is to this, combined with the consequent 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 Britain’s making, the days when the land was in the melting-pot as far as race and nationality are concerned.

B. MILITARY VALUE OF ITS POSITION

York is situated on the higher ground, in the angle made by the rivers Ouse and Foss at their junction; a little to the south, the east and the west there are low ridges of mound.  The outer, main series of hills which border the central plain, are some dozen miles away, their outer faces being more or less parallel and running very roughly north and south.  It seems clear that the site was chosen from the first for its immediate defensive value, the direct result of its geographical features.  The position was of both tactical and strategic importance.  In Roman times, however, its tactical value decreased when the great wall was built that stretched with its lines of mound, ditch, stone-rampart, and road, and its series of camps and forts, from near the mouth of the Tyne to Solway Firth.  Henceforth the wall marked the debatable frontier, but York never lost its strategic value.  It was thus used by the Romans, William I., Edward I., Edward II., and Edward III. in their occupation of and their expeditions against the North.  It has served as a base depot and military headquarters for centuries.

C. POLITICAL IMPORTANCE

York, then, whatever its name (for it had many names) or condition, inevitably became an occupied place, a stronghold or a town from earliest times.  When the Church attained great importance in the north, York, in addition to its natural and military values became, in 735, an ecclesiastical metropolis, for from this date the Archbishop of York was not only the ruler of the diocese of York, but in addition