There is a british film from 1900, Let me dream again, by George Albert Smith (from the so called Brighton school), you can find it in the British Film Institute archive: http://collections-search.bfi.org.uk/web/Details/ChoiceFilmWorks/150057452
The film is included in their collection "1895-1910. Early Cinema" vol. 1
In the short film, a man (G.A. Smith himself) is having fun with a masked woman (his wife in real life), then the camera goes out of focus and there's a cut to a new blurred shot. When it gets back in focus, we see the same man yawning in his pijamas, in bed with a different (and quite uglier) woman that hits him.
In Chaplin's The Kid (1921), there's a complete change of scenography around him sleeping, in a subtle transition.
Of course, none of these silent films gets the Harp you mention, but they might be of use as precedents for what you need.