Two of the greatest films of all time!
I don't know much about her, but maybe she was downplayed somewhat, in favor of Merle Oberon, who was married to one of the Kordas...
I had just surmised Duprez might have had a problematic husband or agent who wanted too much money, and she wound up getting the cold shoulder from the main studios. Wild guess. She certainly had a good enough resume to get into some slick Fox, Paramount b-films, at very least. But she wound up starting her American career in the very lowest dregs.
Don’t really know how I’d rank her acting abilities, but she sure did have pretty eyes. Was quite fetching in some of those cheapies, like that z-grade Frank Buck thing.