While there, she appeared in music hall concerts and caught the eye of the British-American orchestra conductor and composer John Braham, who felt that she had stage presence and later helped her secure a position with the Comley-Barton Opera Company.

Olivette, the English adaption of Les noces d'Olivette, a comic opera with music by Edmond Audran, debuted at the Bijou on Christmas Day with Jansen as the Waiting Maid to the Countess.

[11] With the McCaull Comic Opera Company in November 1883, she appeared at Haverley's Theatre, Philadelphia, in the title role of the Johann Strauss operetta Prinz Methusalem.

In the spring of 1884 Charles Wyndham signed Jansen to create, at London's Criterion Theatre, the lead role, Mrs. Coney, in Featherbrain, from the French play La Téte de Linotte by Théodore Barrière and Edmond Gondinet.

In May 1888, again at the Casino, Jansen created for the American stage the title role in Nadjy, adapted by Alfred Murray from the Francis Chassaigne operetta, Les noces improvises.

Jansen next played Angelina, a circus equestrian, opposite Wilson, in The Lion Tamer, opening in December 1891, with book and lyrics by Goodwin, music by Richard Stahl and orchestrations by John Philip Sousa.

[22] In 1893 Jansen began a several-years-long tour at Boston's Howard Athenaeum as Trixie Hazelmere the Queen of the Vaudevilles in Delmonico's at Six, a comic play written specifically for her by Glen MacDonough.

[1] Jansen was thought to have earned over her career an estimated $500,000, but by the time of her bankruptcy she was unable to pay a $7 a-week bill for lodging while working as seamstress and occasionally appearing on stage in minor roles.

[25] Jansen's last known stage appearance came in the fall of 1908 at New York's Olympic Theatre as a principal performer in comedian Edmond "The Wise Guy" Hayes' vaudeville show, Mardi Gras Beauties.