Heine and his fellow radical exile in Paris, Ludwig Börne, had become the role models for a younger generation of writers who were given the name "Young Germany". They included Karl Gutzkow, Heinrich Laube, Theodor Mundt and Ludolf Wienbarg. They were liberal, but not actively political. Nevertheless, they still fell foul of the authorities. In 1835 Gutzkow published a novel, "Wally die Zweiflerin" ("Wally the Sceptic"), which contained criticism of the institution of marriage and some mildly erotic passages. In November of that year, the German Diet consequently banned publication of works by the Young Germans in Germany and – on Metternich's insistence – Heine's name was added to their number. Heine, however, continued to comment on German politics and society from a distance. His publisher was able to find some ways of getting around the censors and he was still free, of course, to publish in France. Heine's relationship with his fellow dissident Ludwig Börne was troubled. Since Börne did not attack religion or traditional morality like Heine, the German authorities hounded him less although they still banned his books as soon as they appeared. Börne was the idol of German immigrant workers in Paris. He was also a republican, while Heine was not. Heine regarded Börne, with his admiration for Robespierre, as a puritanical neo-Jacobin and remained aloof from him in Paris, which upset Börne, who began to criticise him (mostly semi-privately). In February 1837, Börne died. When Heine heard that Gutzkow was writing a biography of Börne, he began work on his own, severely critical "memorial" of the man. When the book was published in 1840 it was universally disliked by the radicals and served to alienate Heine from his public. Even his enemies admitted that Börne was a man of integrity so Heine's "ad hominem" attacks on him were viewed as being in poor taste. Heine had made personal attacks on Börne's closest friend Jeanette Wohl so Jeannette's husband challenged Heine to a duel. It was the last Heine ever fought – he received a flesh wound in the hip. Before fighting, he decided to safeguard Mathilde's future in the event of his death by marrying her. Heine continued to write reports for Cotta's "Allgemeine Zeitung" (and, when Cotta died, for his son and successor).