I added this film to TMDB (https://www.themoviedb.org/movie/694185-seance-de-prestidigitation) and thus to Letterboxd because I found out it wasn't available on Letterboxd. In some 30 hours the details concerning cast (Méliès), production (Méliès), poster, English name, etc. should be available on Letterboxd as it takes time until information from TMDB is imported onto Letterboxd.
This is Méliès second film, and apparently it is not lost as it was found in 2014 and identified in 2015 (https://en.wikipedia.org/wiki/Conjuring_(film)), but I haven't been able to find it.
If someone finds it, I'd be grateful if they could provide me with a link.