Home› Librettists› James Grun Librettist · Catalogued Works James Grun 2 opera libretti catalogued, listed by date of premiere. Complete Catalogue of Libretti by James Grun 1895 Der arme Heinrich by Hans Pfitzner, 1895 Hans Pfitzner German 1900 Die Rose vom Liebesgarten by Hans Pfitzner, 1900 Hans Pfitzner German