Anne Charlotte Edgren-Leffler, duchess of Cajanello (1 October 1849 – 21 October 1892), was a Swedish author.She was the daughter of the school principal John Olof Leffler and Gustava Wilhelmina Mittag. Her brother was noted mathematician Gösta Mittag-Leffler. Leffler was initially educated privately and then a student at the Wallinska skolan from the age of thirteen, at that time perhaps the most progressive school open to females in Stockholm.[citation needed] Her first volume of stories appeared in 1869, but the first to which she attached her name was Ur lift ("From Life," 1882), a series of realistic sketches of the upper circles of Swedish society, followed, by three other collections with the same title. Her earliest plays, Skådespelerskan ("The Actress," 1873), and its successors were produced anonymously in Stockholm, but in 1883 her reputation was established by the success of Sanna Kvinnor ("True Women") and En räddande angel ("An Angel of Deliverance"). Sanna Kvinnor is directed against false femininity and was well received in Germany as well as in Sweden.[1] Anne Leffler had married G. Edgren in 1872, but about 1884 she was separated from her husband, who did not share her advanced views. She spent some time in England, and in 1885 produced her Hur man gör gott ("How one does good"), followed in 1888 by Kampen för lyckan ("The Struggle for Happiness"), with which she was helped by Sofia Kovalevskaya. Another volume of the Ur Lifvet series appeared in 1889, and Familjelycka ("Domestic Happiness," 1891) was produced in the year after her second marriage (to the Italian mathematician, Pasquale del Pezzo, duca di Cajanello) Less