At the same time, Gilbert created several "fairy comedies" at the Haymarket Theatre. This series of plays was founded upon the idea of self-revelation by characters under the influence of some magic or some supernatural interference. The first was "The Palace of Truth" (1870), based partly on a story by Madame de Genlis. In 1871, with "Pygmalion and Galatea", one of seven plays that he produced that year, Gilbert scored his greatest hit to date. Together, these plays and their successors such as "The Wicked World" (1873), "Sweethearts" (1874), and "Broken Hearts" (1875), did for Gilbert on the dramatic stage what the German Reed entertainments had done for him on the musical stage: they established that his capabilities extended far beyond burlesque, won him artistic credentials, and demonstrated that he was a writer of wide range, as comfortable with human drama as with farcical humour. The success of these plays, especially "Pygmalion and Galatea", gave Gilbert a prestige that would be crucial to his later collaboration with as respected a musician as Sullivan.