"He is like the footman in Warning Shadows"

Warning Shadows is a silent German Expressionist film, made in 1922 without subtitles (which was unusual for that period). 

Its full German title is Schatten: Eine Nächtliche Halluzination (Shadows: A Nocturnal Hallucination).

The film deals with the themes of shadows, reflections and the doppelgänger (the 'double'), which were popular themes in German cinema at that time.