Caroline was born in 1763, and was twenty-one at the time of her first marriage. A. W. Schlegel made her acquaintance whilst he was a student at Göttingen, and fell in love with her, but she refused to marry him. Intercourse between them was broken off for a time, but was carried on by correspondence while Schlegel was at Amsterdam, where he went as a tutor in 1791. Here various amorous episodes, amongst them one serious love affair, threw Caroline for a time into the shade. Meanwhile, she was entangling herself in a net of the strangest relations. In 1799 she had gone to Mainz, where she lived in the house of Georg Forster, Humboldt's teacher, a man equally distinguished as a scientist and an author. When this gifted and admirable, but far too sanguine man, embarked on revolutionary enterprises and attempted to extend French republicanism to the Rhine districts, Caroline enthusiastically aided and abetted him. She was in communication with the members of the Republican Club in Mainz, and she was unjustly suspected of communicating with the enemy through her brother-in-law, G. Böhmer, who was Custine's secretary. When Mainz was reconquered by the German troops, she was arrested, and spent several months in barbarous imprisonment, sharing a room with seven other people. From prison she wrote to A. W. Schlegel for assistance. Her position was even worse than it appeared to be. In Mainz, in desperation at the disappointment of her dearest hopes (she had expected that the manly, energetic Tatter would offer her his hand), she had thrown herself into the arms of her adorer for the moment, a Frenchman, and the results of this connection would inevitably compromise her for ever, if she were not freed from prison in time. Schlegel's influence and her own brother's unremitting endeavours procured her release. With quiet chivalry August Wilhelm placed Caroline, now forsaken by all her other friends, under the protection of his younger brother, Friedrich. It was in these singularly unpropitious circumstances that Friedrich made her acquaintance. He was by no means prepossessed in her favour, in fact, was inclined to look upon her with contempt; yet this is how he writes: "I had certainly not expected simplicity and a positively divine truthfulness.... She made a profound impression upon me. I longed to be in a position to win her confidence and friendship; but the moment she showed some return of the feeling I saw very clearly that the bare attempt would lead to the most painful struggles, and that if a friendship between us were possible at all, it could only be the fruit of much that was unjustifiable.... Thenceforward every selfish desire was abandoned. The relation in which I stood to her was perfectly innocent and simple. In my behaviour there was the reverence of a son, the candour of a brother, the frankness of a child, and the unobtrusiveness of a stranger."[7]