To Clarendon such a demand seemed as great an usurpation on the rights of the Crown as any measure of the Long Parliament, and he advised a dissolution. But the advice was rejected, for there was no hope that fresh elections could bring together a more royalist House of Commons than that of 1661. The attitude of the Houses showed in fact that the hottest Royalists had learned, whether they would or no, the lesson of the Civil War. Whatever might in other ways be the temper of the Commons who assembled at Westminster, it was certain that the great constitutional revolution which was slowly removing the control of affairs from the hands of the Crown into those of the Parliament would go just as steadily on. But if Charles refused to dissolve the Parliament he longed to free himself from its power; and the mediation of France enabled a peace congress to assemble at Breda in May 1667. To Holland, eager to free its hands so as to deal with the French invasion of the Netherlands, an invasion which was now felt to be impending, peace was yet more important than to England; and a stroke of singular vigour placed peace within her grasp. Aware of the exhaustion of the English treasury and of the miserable state of the English navy, the persevering De Witt suddenly ordered the Dutch fleet, sixty vessels strong, to sail in June to the Thames. England was taken utterly by surprise. Neither ships nor forts were manned when the Hollanders appeared at the Nore. Pushing their light vessels without show of opposition up the Thames to Gravesend they forced the boom which protected the Medway, burned three men-of-war which lay anchored in the river, and withdrew only to sail proudly along the coast, the masters of the Channel. [Sidenote: Fall of Clarendon.]