Pozzo di Borgo remained at Vienna during the whole campaign of 1809, and when peace was again imposed, Buonaparte did not forget him. He had taken an active part in all the diplomatic proceedings of Austria and Russia, and Napoleon was a person who always retained the remembrance of his enemies; accordingly, after the peace of Vienna, his first step was to demand the banishment of Colonel Pozzo di Borgo from the Austrian dominions. Alexander, warmly attached to Napoleon, had the weakness to consent, and this gave occasion to the fine and energetic letter, in which Colonel Pozzo already prophesied the invasion of Russia, and said to the Czar, "Sire, it will not be long before your majesty again summons me to your presence." In order to escape the fate which awaited him if his enemy of Ajaccio should succeed in seizing his person, he took the precaution of retiring to Constantinople, the only spot which still afforded him the power of quitting continental Europe and seeking refuge in England. He was now a proscribed man, travelling in Syria, visiting Smyrna and Malta, and from Malta proceeding to London, where he arrived in October 1810. He was already an agent of some importance, on account of the missions upon which he had been employed; and the limited intercourse between England and the Continent made her set a value upon the information to be obtained from a man of political talent and experience, who had just arrived from the principal capitals of Europe. In several conferences with Lord Castlereagh, Colonel Pozzo explained to him the hopes he still entertained of a continental rising against the colossal empire of France: in the midst of all his great qualities, Napoleon had still some vulnerable points, and nobody was better aware of them than Pozzo di Borgo, because he had studied them through the medium of his resentment. Who could be so well acquainted as he with that Buonaparte, whom he had had such opportunities of observing in the closest manner, with his infirmities, his fits of anger, his weaknesses, and his ambition?