This is likely due to several factors:
* Early film industry: Film records from this early period in cinema history weren't as well documented as they are today.
* Loss of information: Many film records have been lost over the years due to fires, natural disasters, or simply poor preservation.
* Danish film: "Manden med Arret" is a Danish film, and Danish film history, especially from the silent era, is not as widely researched or accessible as Hollywood cinema.
Therefore, identifying the actors and actresses in "Manden med Arret" is challenging. It's possible that more information might be found in specialized archives or through ongoing research on Danish silent film.