This movie was shot between 1919 and 1920, a few decades since the motion picture camera was invented, and the Lumière brothers were in the middle of their experiments with it. At the time, cinema was being considered as a new way of making art, and yo make art you had to marry with a serie of ideas: ideology, aesthetics, cosmogony, etc. In these terms, this movie belongs to the German expressionism, which is reflected in the entire setup: from characters make up to the background of the set.
Having an average murder-mystery plot, the movie can be defined as a painting with some action occurring in it. The whole scenario was displayed following the same criteria as in expressionist painting: all diagonal and curve lines, evading the straightness and the cardinal orientation of things, wicked perspectives and proportions. Even the more minimum detail was carefully considered to fulfill the aesthetics needs. The result couldn't have been better, considering that the only visual trick they could do was to shrink/enlarge the camera's diafragma. Think that this was before the concept of travelling was even developed.
Concerning the plot, yet it's true that it isn't really the great thing and that many people now a days find it boring, I got to enjoy it, further than its aesthetical function (I even got to laugh in a couple of scenes), and I highly recommend it, as a good old piece of art from which many of today's film makers may take some good lessons on how to approach movies. I'm sure that if they got understand that, then there would be much lesser crappy movies than there are now a days.
