The attitude of France was more important than that of the German States, and in the autumn Bismarck made a fresh visit to that country. Just as he had done the year before, he went to take the sea-baths at Biarritz. This step was the more remarkable because Napoleon had received the news of the Treaty of Gastein with marked displeasure, and had given public expression to his opinions. Bismarck saw Drouyn de Lhuys at Paris and then went on to Biarritz where the Emperor was; for ten days he lived there in constant association with the Imperial family. The personal impression which he made was very favourable: "A really great man," wrote Mérimée, "free from feeling and full of _esprit_." He saw Napoleon again on his return through Paris; the two succeeded in coming to an understanding. Napoleon assured him that he might depend on the absolute neutrality of France, in case of a war between Prussia and Austria; it was agreed also that the annexation of the Duchies to Prussia would not be an increase of territory which would cause any uneasiness at Paris; Napoleon would view it with favour. Bismarck went farther than this; he opened the subject of a complete reform of the German Constitution on the lines that Prussia was to have a free hand in the north of Germany; he pointed out "that the acquisition of the Duchies would only be an earnest for the fulfilment of the pledge which history had laid upon the State of Prussia; for the future prosecution of it we need the most friendly relations with France. It seems to me in the interest of France to encourage Prussia in the ambitious fulfilment of her national duty." The Emperor acquiesced; as we know, the division of Europe into large national States was what he meant by Napoleonic ideas; he was willing enough to help in Germany a change such as that he had brought about in Italy. It was agreed that events should be allowed to develop themselves; when the time came it would be easy enough to come to some definite agreement.