She was trained by the Swedish opera singer Algot Lange (1850-1904) who considered her voice too weak and inflexible for the stage.
[1] Her début at the Royal Theatre in 1898 was as Carmen was acclaimed not only for her delicate interpretation of the music but also for her accomplished stage performance.
[2] Her figure and sense of drama appear to have been even more suited to roles such as Siebel in Faust, Cherubino in The Marriage of Figaro and Octavian in Der Rosenkavalier.
In 1915, she was elevated to the rank of Kongelig Kammersanger (Royal Chamber Singer) by King Christian X. Margrethe Lendrop retired while still young in 1919, hoping to devote more time to concert performances but she died suddenly in 1920.
They include arias from Mignon, Cavalleria Rusticana, Carmen, Il Trovatore, La Bohème, Faust and The Marriage of Figaro.