Concerning the two Northumbrian kingdoms, Deira and Bernicia, we have no information in the Chronicle for the first hundred years after the landing of Hengest and Horsa. We are then under the year told that Ida (descended in the ninth generation from Woden) was the founder of the royal line of Northumbria; that he built Bebbanburh (Bamburgh) and that this celebrated fortress was in the first instance surrounded with a fence and afterwards with a wall. The chronicler then tells us that in 560, on the death of Ida, Aelle (eleventh in descent from Woden) began to reign over Northumbria and reigned for [nearly] thirty years. The chronicler here either wilfully or inadvertently has suppressed something of the truth. From his language one might have conjectured that Aelle was of the lineage of Ida, and had succeeded peaceably to his ancestor. Instead of this peaceable succession, however, we know from other sources that we have here to deal with two rival kingly lines, whose feuds and reconciliations make an important chapter in Northumbrian history. The true situation was this: essentially the kings of Ida’s line were rulers of Bernicia, while Aelle and his descendants ruled Deira. That is to say: from their steep rock-palace of Bamburgh the sons of Ida reigned by ancestral right over all the eastern portion of the lands between Tyne and Forth, between the wall of Hadrian and the wall of Antoninus. Similarly Aelle and his sons, firmly settled in the great Roman city of Eburacum, governed the country between Tyne and Humber; but each king ever aspired to extend his sway over the other kingdom and often succeeded for a while in doing so. Thus we have constant vicissitudes but a general tendency towards the union of the two kingdoms into one Northumbria, which obeys now an “Iding,” now an “Aelling” ruler. What strifes and commotions may have attended the transition from one line to another we can only in part discern. We are only obscurely told that in 588 Aelle’s line was ousted, and that Ethelric the son, and after him Ethelfrith the grandson of Ida reigned over all Northumbria. * * * * * 3. We now come to the British version of the conquest. Though a nation is naturally reluctant to tell the story of its own defeat, we might have expected to receive from a comparatively civilised and Christianised people, such as the Romano-Britons of the fifth century, some intelligible literary history of so important an event as the Teutonic conquest of their island. This expectation, however, is dismally disappointed. We have practically nothing from the vanquished people, but the lamentations of the sixth century author Gildas, and the obviously fable-tainted narratives of the puzzle-headed Nennius of the eighth century.