But of all the questions which threatened to disturb the peace of Europe, that of Belgium, by reason of the conflict of national interests to which it gave rise, was by far the most delicate. It is not without cause that, for centuries, the Low Countries have been the chief battle ground of the Powers. Bonaparte is supposed to have described the possession of Antwerp as "a loaded pistol held at England's head." Unquestionably, during the great war, England had had experience of the difficulties of watching the coastline of Belgium and Holland united to that of France. The lesson had not been thrown away upon Lords Grey and Palmerston, who were fully determined to resist, at all costs, the acquisition of any portion of the Low Countries by a first-class military Power. On the other hand France had excellent reasons for objecting to the system under which the Kingdom of the Netherlands had been created, and the barrier fortresses erected. In the words of General Lamarque, the chief parliamentary spokesman of the war party, these defences constituted, within four days' march of Paris, a _tête de pont_ behind which the armies of a hostile coalition might assemble at leisure. Moreover, France, in 1815, had been deprived of the fortresses of Marienburg and Philippeville, both of which had been incorporated into the Kingdom of the Netherlands, and it was hoped that in any scheme of re-arrangement these two places would be restored to her. All supporters of the new monarchy were keenly alive to the immense satisfaction with which the smallest modification of the hated treaties of 1815 would be received throughout the country. Men of moderate views, such as Charles de Rémusat and Guizot, looked upon "a brilliant diplomatic triumph" or "some acquisition of territory towards Belgium" as conditions essential to the stability of the Orleans throne.[52] On the other hand, it was the policy of Austria, Prussia and Russia, as it was that of Great Britain, to preserve intact the territorial settlement of 1815 and to resist the aggrandisement of France. But the attitude of the Northern Courts was also greatly influenced by the marriages which connected the King of the Netherlands and the Prince of Orange with the Royal family of Prussia and the Imperial House of Russia. In addition to these considerations of relationship the sympathies of the absolute sovereigns necessarily went out to a monarch struggling with a rebellion of his subjects, and they could not but be reluctant to participate in measures tending to legalize a revolution.