The kingdom of Essex was conquered with equal facility; and the East Angles, from their hatred to the Mercian gov ernment, which had been established over them by treachery and violence, and probably exercised with tyranny, immediately rose in arms, and craved the protection of Egbert.[*] Bernulf, the Mercian king, who marched against them, was feated and siain; and two years after, Ludican, his successor, met with the same fate. These insurrections and calamities facilitated the enterprises of Egbert, who advanced into the centre of the Mercian territories, and made easy conquests over a dispirited and divided people. In order to engage them more easily to submission, he allowed Wiglef, their countryman, to retain the title of king, whilst he himself exercised the real powers of sovereignty.[**] The anarchy which prevailed in Northumberland tempted him to carry still farther his victorious arms; and the inhabitants, unable to resist his power, and desirous of possessing some established form of government, were forward, on his first appearance, to send deputies, who submitted to his authority, and swore allegiance to him as their sovereign. Egbert, however, still allowed to Northumberland, as he had done to Mercia, and East Anglia, the power of electing a king, who paid him tribute, and was dependent on him. Thus were united all the kingdoms of the Heptarchy in one great state, near four hundred years after the first arrival of the Saxons in Britain; and the fortunate arms and prudent policy of Egbert at last effected what had been so often attempted in vain by so many princes.[***] Kent, Northumberland, and Mercia, which had successively aspired to general dominion, were now incorporated in his empire; and the other subordinate kingdoms seemed willingly to share the same fate. His territories were nearly of the same extent with what is now properly called England; and a favorable prospect was afforded to the Anglo-Saxons of establishing a civilized monarchy, possessed of tranquillity within itself, and secure against foreign invasion. This great event happened in the year 827.[****] [* Ethelwerd, lib. iii. cap. 2.] [** Ingulph. p. 7, 8, 19.] [*** Chron. Sax. p. 71.] [**** Chron. Sax. p. 71.]