So this is an interesting one - another find on Ebay, this time from Rupert's very last film in 1930 (and perhaps his only talkie), The Cat Creeps. I'd heard of the film, but what I'd never heard (until now) is that there were two casts, and two directors!
There's a trailer for it online - which seems to be most of what survives of the film, unfortunately - but what I hadn't heard about was the Spanish language version, made at the same time on the same sets, directed by someone else entirely…