Le cercueil de verre or The Mystery of The Glass Coffin, was a film directed by Victorin-Hippolyte Jasset, written by André de Lorde, and starring André Liabel & Josette Andriot. A short, dramatic film, it was released to theaters on March 1, 1912 in France.
There seems to be almost no information regarding the movie on the Internet, with a lone IMDB page being the source of its known existence. Besides a cast list, there seem to be no pictures, movie fragments, or even a poster promoting the film that can be found.