sentences:  His most successful films were "Mutter Krausens Fahrt ins Glück" ("Mommy Krause's Trip into Happiness") and "Jenseits der Straße" ("On the Far Side of the Street"), for which he wrote the screenplay.At Ufa, he also made the acquaintance of Fritz Lang, who later used his "Mr. Tot" novel for his last film, "The Thousand Eyes of Dr. Mabuse" (1960).He also continued his work in Esperanto.