Bismarck did not continue the negotiations, for he had found a better way. Till August 23d his relations to Austria were still doubtful; he always had to fear that there was some secret understanding between France and Austria, that a coalition of the two States had been completed, and that Prussia might suddenly find herself attacked on both sides. He had, therefore, not wished to offend France. Moreover his relations to Russia were not quite satisfactory. The Czar took a very serious view of the annexations in North Germany: "I do not like it," he said; "I do not like this dethronement of dynasties." It was necessary to send General Manteuffel on a special mission to St. Petersburg; the Czar did not alter his opinion, but Bismarck found it possible at least to quiet him. We do not know all that passed, but he seems to have used a threat and a promise. If the Czar attempted to interfere in Germany, Bismarck hinted, as he had already done, that he might have to put himself at the head of the Revolution, and proclaim the Constitution of 1849; then what would happen to the monarchical principles? He even suggested that a Revolution which began in Germany might spread to Poland. The Czar explained that he was discontented with many clauses in the Treaty of Paris. There was an understanding, if there was no formal compact, that Prussia would lend her support, when the time came for the Czar to declare that he was no longer willing to observe this treaty. By the end of August Bismarck had therefore removed the chief dangers which threatened him. Russia was quieted, France was expectant, Austria was pacified. He had, however, done more than this: he had already laid the foundation for the union of the whole of Germany which Napoleon thought he had prevented.