sentences: "His popular tales have somewhat more merit than his poems; but it is in the line of operatic plays that he is best and most generally known.Besides "Der Freischütz", he wrote the play "Das Nachtlager von Granada" (1818), which later became the model for Karl Johann Braun von Braunthal's libretto for Conradin Kreutzer's opera "Das Nachtlager in Granada" (1833).