She was still in the springtime and flush of youth, when she went on a tour to Germany, and visited several German courts, where she excited the same sentiments of admiration as in her own country; it was impossible to see her without being attracted by so much intellect, grace and amiability. Travelling enlarged her horizon: she was able to survey, as from a watch-tower, the course of great political events, and she found herself mixing continually with the most celebrated savants and statesmen of the age. Her friendly relations with persons of very diverse opinions, while enabling her to compare and contrast a great variety of theories, did but strengthen in her "the idea and sentiment of liberty, which can alone conduct society to its true aim." Finally, from the Italian revolution of 1848, which awoke her warmest sympathies, she learned to understand the fatal consequences of despotic government, as well as the inevitable mistakes of freedom, when first unfettered and allowed to walk alone. At the age of twenty she was married (February, 1849), and soon afterwards she set out for St. Petersburg, where she was recognised as the ornament of the higher society. In the midst of her numerous engagements, in the midst of the homage rendered to her wit and grace, she found time to collect a mass of valuable notes on the condition and inner life of the great Russian Empire, several provinces of which she knew from personal observation. From St. Petersburg to Moscow, from Odessa to Revel, her untiring activity carried her. Most social questions are at work under an apparent calm, and offer, therefore, subjects well worthy of careful study, especially to so grave and clear an intellect as that of Princess Dora d'Istria, who possessed, in the highest degree, the faculty of steady meditation amidst the movement and the world-stir that surrounded her. The world, charmed by her personal attractions, had no suspicion of the restlessness and activity of her inquiring mind. Her departure to the South brought her inquiries and investigations to an end. She had suffered so much from the terrible winters of the great Northern capital, and her health was so seriously shaken, that her doctors presented to her the grave alternative of departure or death (1855). The Princess Dora d'Istria, as we have hinted, was a fine linguist. She made herself mistress of nine languages. Her historical erudition was profound; her mind was continually in search of new knowledge. She seemed to have inherited from one of her illustrious friends, M. von Humboldt, that "fever of study," that insatiable ardour, which, if not genius, is closely akin to it.