Encouraged by this success, and still more by the contempt which it inspired for their enemy, the pirates ventured to attack the centre of the kingdom; and entering the Thames in ninety-four vessels, laid siege to London, and threatened it with total destruction. But the citizens, alarmed at the danger, and firmly united among themselves, made a bolder defence than the cowardice of the nobility and gentry gave the invaders reason to apprehend; and the besiegers, after suffering the greatest hardships, were finally frustrated in their attempt. In order to revenge themselves, they laid waste Essex, Sussex, and Hampshire; and having there procured horses, they were thereby enabled to spread through the more inland counties the fury of their depredations. In this extremity, Ethelred and his nobles had recourse to the former expedient; and sending ambassadors to the two northern kings, they promised them subsistence and tribute, on condition they would, for the present, put an end to their ravages, and soon after depart the kingdom. Sweyn and Olave agreed to the terms, and peaceably took up their quarters at Southampton, where the sum of sixteen thousand pounds was paid to them. Olave even made a journey to Andover, where Ethelred resided, and he received the rite of confirmation from the English bishops, as well as many rich presents from the king. He here promised that he would never more infest the English territories; and he faithfully fulfilled the engagement. This prince receives the appellation of St. Olave from the church of Rome; and notwithstanding the general presumption which lies either against the understanding or morals of every one who in those ignorant ages was dignified with that title, he seems to have been a man of merit and of virtue. Sweyn, though less scrupulous than Olave, was constrained, upon the departure of the Norwegian prince, to evacuate also the kingdom with all his followers.