As they approached near what was once Oxford and is now Sypolis, the armies of the Cymry came into collision with another of our invaders, and thus their forward course to the south was checked. The Irish, who had hitherto abetted them, turned round to defend their own usurpations. They, too, say that in conquering and despoiling my countrymen they are fulfilling a divine vengeance. Their land of Ireland had been for centuries ground down with an iron tyranny by our ancestors, who closed their lips with a muzzle, and led them about with a bridle, as their poets say. But now the hateful Saxons (for thus both they and the Welsh designate us) are broken, and delivered over to them for their spoil. It is not possible to deny many of the statements that they make, but that should not prevent us from battling with might and main against the threatened subjection. What crime can be greater than the admission of such foreigners as the guards of our cities? Now the Irish have their principal rendezvous and capital near to the ancient city of Chester, which is upon the ocean, and at the very top and angle of Wales. This is their great settlement, their magazine and rallying-place, and thence their expeditions have proceeded. It is a convenient port, and well opposite their native land, from which reinforcements continually arrive, but the Welsh have ever looked upon their possession of it with jealousy. At the period when the Cymry had nearly penetrated to Sypolis or Oxford, the Irish, on their part, had overrun all the cultivated and inhabited country in a south and south-easterly line from Chester, through Rutland to Norfolk and Suffolk, and even as far as Luton. They would have spread to the north, but in that direction they were met by the Scots, who had all Northumbria. When the Welsh came near Sypolis, the Irish awoke to the position of affairs. Sypolis is the largest and most important city upon the northern shore of the Lake, and it is situated at the entrance to the neck of land that stretches out to the straits. If the Welsh were once well posted there, the Irish could never hope to find their way to the rich and cultivated south, for it is just below Sypolis that the Lake contracts, and forms a strait in one place but a furlong wide. The two forces thus came into collision, and while they fought and destroyed each other, Sypolis was saved. After which, finding they were evenly matched, the Irish withdrew two days' march northwards, and the Cymry as far westwards.