However this may be, it is pretty certain that the Cambridge on which Guthrum, in the year 872, marched from Repton was the "Borough" of Castle End. After holding, or, as one chronicler (Gaimar) would have us believe, only besieging it, for a whole year, the Danish host hastily made off to Wareham in Dorsetshire, to take part in that life and death struggle in the west which began with Alfred's great naval victory off Swanage, then drove him into hiding at Athelney, and ended with the Peace of Wedmore. By that treaty all England north of the Watling Street was ceded to the Danes as an under-kingdom, the "Dane-Law"; Guthrum, now a Christian and Alfred's godson, being set on the throne. Cambridge thus became undisputedly a Danish town. The district around was divided "with a rope" (_i.e._ by chain measure) amongst the invaders, and submitted as an organic whole, some half century later, to King Edward the Elder. It was probably at this time that the town began to extend itself into the East Anglian district to the east of the Cam. (Throughout its whole length the river, with its marshy banks, was the boundary between the old English kingdoms of Mercia and East Anglia; and traces of this are to be found in the distinctive customs of adjoining villages, on one side or the other of the stream, even to this day.) The "Saxon," or Romanesque, tower of St. Benet's Church, may well be of this date, erected by the English inhabitants dispossessed of their homes in the Borough by the conquering Danes who lorded it over them. After its submission to Edward the Elder, Cambridge began its career as a County Town, giving its name, (as was the case in nearly all these new Edwardian counties,) to the surrounding district, which thus became known as Grantabrig-shire. The name covered only the southern part of the present county; for the Isle of Ely was reconstituted under the ancient jurisdiction of its great abbots and bishops. To this day, indeed, it has its own separate County Council, and even a separate motor-car lettering. The new political unit soon began to display no small local patriotism; for we read that in the fatal battle of Ringmere, fought on Ascension Day, 1010, between the fresh Danish invaders, who were then pouring over the land, and the united forces of East Anglia under the hero Ulfcytel, "soon fled the East English. There stood Grantabryg-shire fast only." [Illustration: _The Backs, Clare College Gate._]