After their return to London, they hid out in a safe-house apartment near the Liverpool Street Underground Station.A group of frightened, sex-trafficked Asian women were found as captives, claiming that they had been saved by "a devil.As the creatures sucked away Black""s soul and also threatened Harry""s life, Harry called upon his Patronus spell for a protective shield: "Expecto Patronum!" but they were too overpowering.However, they did not ransack the own, confront the locals, or cause civil unrest (except for some arrests for drunkenness, or urinating in public - often due to a lack of restrooms).The success of the balletic themes that combined dance with design and music in Powell and Pressburger""s British film inspired director Vincente Minnelli to follow suit in his own masterpieceAn American in Paris (1951)- he had experimented with shorter ballet sequences in his earlier filmsYolanda and the Thief (1945)andZiegfeld Follies (1946).