The suspicion that the three Northern Courts were meditating an unprovoked attack upon France was unfounded. As Lord Heytesbury pointed out, the cholera, which had made its appearance in the Tsar's dominions, threw an insuperable obstacle in the way of recruiting upon a large scale. Russia indeed, he considered, might almost be looked upon as _hors de combat_.[46] Nor was Metternich proposing to begin hostilities against France. "Austria's task," he instructed Esterhazy, the ambassador in London, "consists in suppressing any insurrectionary movement in Italy." But should the French interpose in favour of the revolutionists, their action must be resisted vigorously. It was expedient, therefore, for the three great continental Powers to hold their armies in readiness. "The British government must be brought to understand that Austria cannot accept the principle of non-intervention. England, as an insular State, can adhere to it without danger, but when adopted by France it imperils the existence of neighbouring Powers. The proclamation of such a doctrine can be compared only to the complaints of thieves about the interference of the police."[47] But, although the absolute Courts were certainly innocent of any desire to provoke a war deliberately, there were serious elements of danger in the situation. The King of the Netherlands, without doubt, looked upon the outbreak of a great European war as the only chance of regaining his Belgian provinces. Charles X. was once more installed quietly in his old quarters at Holyrood, but his adherents, the Legitimists, or Carlists, as they were more usually termed, were convinced that a war must prove fatal to the new _régime_ in France. Talleyrand suspected that they were in league with the military party in Paris, and suggested that an agent should be sent over to London to watch them. He had no complaints to make about the assistance afforded him by the Home Secretary, who placed all the information he could obtain about them at his disposal, but, "in a country in which the police system was so bad, such reports had little value."[48]