After the Battle of Hastings, the taking of Dover, the surrender of London, and the submission of the principal nobility, William had nothing left but to order in the best manner the kingdom he had so happily acquired. Soon after his coronation, fearing the sudden and ungoverned motions of so great a city, new to subjection, he left London until a strong citadel could be raised to overawe the people. This was built where the Tower of London now stands. Not content with this, he built three other strong castles in situations as advantageously chosen, at Norwich, at Winchester, and at Hereford, securing not only the heart of affairs, but binding down the extreme parts of the kingdom. And as he observed from his own experience the want of fortresses in England, he resolved fully to supply that defect, and guard the kingdom both against internal and foreign enemies. But he fortified his throne yet more strongly by the policy of good government. To London he confirmed by charter the liberties it had enjoyed under the Saxon kings, and endeavored to fix the affections of the English in general by governing them with equity according to their ancient laws, and by treating them on all occasions with the most engaging deportment. He set up no pretences which arose from absolute conquest. He confirmed their estates to all those who had not appeared in arms against him, and seemed not to aim at subjecting the English to the Normans, but to unite the two nations under the wings of a common parental care. If the Normans received estates and held lucrative offices and were raised by wealthy matches in England, some of the English were enriched with lands and dignities and taken into considerable families in Normandy. But the king's principal regards were showed to those by whose bravery he had attained his greatness. To some he bestowed the forfeited estates, which were many and great, of Harold's adherents; others he satisfied from the treasures his rival had amassed; and the rest, quartered upon wealthy monasteries, relied patiently on the promises of one whose performances had hitherto gone hand in hand with his power. There was another circumstance which conduced much to the maintaining, as well as to the making, his conquest. The posterity of the Danes, who had finally reduced England under Canute the Great, were still very numerous in that kingdom, and in general not well liked by nor well affected to the old Anglo-Saxon inhabitants. William wisely took advantage of this enmity between the two sorts of inhabitants, and the alliance of blood which was between them and his subjects. In the body of laws which he published he insists strongly on this kindred, and declares that the Normans and Danes ought to be as sworn brothers against all men: a policy which probably united these people to him, or at least so confirmed the ancient jealousy which subsisted between them and the original English as to hinder any cordial union against his interests.