The Danes were ravaging the country. Mercia had been over-run by them the year before. The Chronicle for several years presents a record of the Danes attacking various places, and either Eadward or his sister Æthelflæd defending them and building fortresses for their defence. They fortified, for instance, Tamworth and Warwick and Runcorn, and at each of these places the common feature of fortification is a conical mound of earth. Take a tram from Carfax to the railway station, and stop at the County Courts and Gaol on your way. The County Gaol you need not visit, or admire its absurd battlements, but within the sham façade is the tower that remains from the Castle of Robert D’Oigli, and beside the tower is just such a conical mound of earth—the Castle Mound.
Against raids and incursions Oxford was naturally protected on three sides. For the Thames on the west and south and the Cherwell on the east cut her off from the attack of land forces, whilst even against Danes coming up the Thames from Reading, marsh lands and minor streams within the belt of these outer waters protected her. For in those early days, when Nature had things almost entirely her own way, there were many more branches of the river, many minor tributary streams flowing where now you see nothing but houses and streets. The Trill Mill stream, for instance, which left the main stream on the west of what is now Paradise Square, is now covered over for the greater part of its course; whilst the main stream, after passing beneath the road some seventy yards outside South Gate, gave off another stream running due south, parallel with the road to Folly Bridge, but itself evidently continued its own course across Merton Fields by the side of what is now Broad Walk, and finally found its way into the Cherwell. And besides this stream, which ran under S. Frideswide’s enclosure, there were, on the east, the minor streams which now enclose the Magdalen Walks. But what Oxford needed to strengthen her was some wall or fosse along the line occupied afterwards by the northern wall of the city, along the line, that is, of George Street, Broad Street and Holywell, and also some place d’armes, some mound, according to the fashion of the times, with accompanying ditches. With these defences it seems probable that she was now provided. Thus fortified Oxford becomes the chief town of Oxfordshire, the district attached to it. And during the last terrible struggle of England with the Danes its position on the borders of the Mercian and West-Saxon realms seems for the moment to have given it a political importance under Æthelred and Cnut strikingly analogous to that which it acquired in the Great Rebellion.
After Sweyn’s death Oxford was chosen as the meeting-place of the great gemot of the kingdom. The gemots, which were now and afterwards held at Oxford, were probably held about the Mound, where houses were erected for the royal residence. In one of these Æthelweard, the King’s son, breathed his last; one was the scene of another dastardly murder of Danes, when Eadric (1015) ensnared Sigeferth and Morkere into his chamber, and there slew them. And here it was, according to Henry of Huntingdon, that King Edmund, who had been making so gallant a struggle against the conquering Cnut, was murdered by Eadric’s son. Eadric, we know, was a traitor, and well-skilled in murders at Oxford. He, when his son had stabbed Edmund by his directions, came to Cnut and
“saluted him, saying, ‘Hail, thou art sole king.’ When he had laid bare the deed done, the King answered, ‘I will make thee on account of thy great deserts higher than all the tall men of England.’ And he ordered him to be beheaded and his head to be fixed on a pole on the highest tower of London. Thus perished Edmund, a brave king.”
And Cnut, the Dane, reigned in his stead. Beneath the shadow of the Mound, built to repel the Danish incursions, the Danish King now held an assembly of the people. At this gemot “Danes and Angles were unanimous, at Oxford, for Eadgar’s law.” The old laws of the country were, then, to be retained, and his new subjects were reconciled to the Danish King. But these subjects, the townsmen of those days, are but dim and shadowy beings to us. It is only by later records that we see them going on pilgrimage to the shrines of Winchester, or chaffering in their market-place, or judging and law-making in their husting, their merchant-guild regulating trade, their reeve gathering his King’s dues of tax or honey, or marshalling his troop of burghers for the King’s wars, their boats floating down the Thames towards London and paying the toll of a hundred herrings in Lent-tide to the Abbot of Abingdon by the way. For the river was the highway, and toll was levied on it. In Edward the Confessor’s time, in return for the right of making a passage through the mead belonging to Abingdon, it was agreed that all barges that passed through carrying herrings during Lent should give to the cook of that monastery a hundred of them, and that when the servant of each barge brought them into the kitchen the cook should give him for his pains five of them, a loaf of bread and a measure of ale. In the seventeenth century the river had become so choked that no traffic was possible above Maidenhead till an Act was passed for the re-opening of it.
It was at Oxford that a great assembly of all the Witan was held to elect Cnut’s successor Harold, and at Oxford, so pernicious a place for kings, that Harold died. At Oxford again when the Northumbrian rebels, slaying and burning, had reached it (1065), the gemot was held which, in renouncing Tostig, came to the decision, the direct result of which was to leave England open to the easy conquest of William of Normandy when he landed in the following year.