They set off on the 5th of July, 1825, for that famous expedition to the Pyrenees, which was to be so important a landmark in Aurore Dudevant's history. On crossing the Pyrenees, the scenery, so new to her--or rather the memory of which had been lying dormant in her mind since her childhood--filled her with wild enthusiasm. This intense emotion contributed to develop within her that sense of the picturesque which, later on, was to add so considerably to her talent as a writer. She had hitherto been living in the country of plains, the Ile-de-France and Berry. The contrast made her realize all the beauties of nature, and, on her return, she probably understood her own familiar scenery, and enjoyed it all the more. She had hitherto appreciated it vaguely. Lamartine learnt to love the severe scenery of Milly better on returning to it after the softness of Italy. The Pyrenees served, too, for Baronne Dudevant as the setting for an episode which was unique in her sentimental life. In the _Histoire de ma vie_ there is an enigmatical page in which George Sand has intentionally measured and veiled every expression. She speaks of her moral solitude, which, at that time, was profound and absolute, and she adds: "It would have been mortal to a tender mind and to a girl in the flower of her youth, if it had not been filled with a dream which had taken the importance of a great passion, not in my life, as I had sacrificed my life to duty, but in my thoughts. I was in continual correspondence with an absent person to whom I told all my thoughts, all my dreams, who knew all my humble virtues, and who heard all my platonic enthusiasm. This person was excellent in reality, but I attributed to him more than all the perfections possible to human nature. I only saw this man for a few days, and sometimes only for a few hours, in the course of a year. He was as romantic, in his intercourse with me, as I was. Consequently he did not cause me any scruples, either of religion or of conscience. This man was the stay and consolation of my exile, as regards the world of reality." It was this dream, as intense as any passion, that we must study here. We must make the acquaintance of this excellent and romantic man.