L'Auberge du Cheval-Blanc
He is known for "The White Horse Inn" ("Im weißen Rößl", 1930), written together with Robert Gilbert and Erik Charell, set to music by Ralph Benatzky. Earlier works were the librettos for Erich Wolfgang Korngold operas "Violanta" (1916) and "Das Wunder der Heliane" (1927).