In 1834, Marcher appeared in one of the conservatory's concerts and in 1836 was engaged by the Royal Theatre as a member of the chorus. In 1842, she successfully performed as a stand-in, taking the role of Jemmy in Rossini's
William Tell. She went on to take other boy roles including the page in Meyerbeer's
Les Huguenots and Cherubino in Mozart's
The Marriage of Figaro. As a result, she was engaged by the company as a singer where she proved most successful taking on comic "madam" roles in operas such as Soler's
La capricciosa corretta and
C. E. F. Weyse's
Et Eventyr i Rosenborg Have. Thanks to her wide-ranging voice, she was also able to perform dramatic roles such as Elvira in Mozart's
Don Giovanni, Anna in Weber's
Der Freischütz and the title role in Bellini's
Norma. Sahlgreen is also remembered for her concert performances. Every year from 1851 to 1869 she was a soloist in the passion concerts performed in the Church of Our Lady by members of the Royal Opera. After 1850, she was a soloist in works by composers such as
Mendelssohn and
Schumann at concerts conducted by
Niels Gade. In 1854, she performed the role of the Elf King's Daughter when Gade's
Elverskud was premiered at the
Musikforeningen. She gave her last performance at the Musikforeningen in 1869. == Death ==