Yep, "hush-hush" is right up his alley (as we say here in the US). I have no idea if Bertrand Russell went to India in the time period the movie covers, but I'd guess not.

Btw, I'll feel a whole lot better about this project once we get corroboration from another source that JN's actually in the movie. IMDb is still the only place I can find any mention of his involvement with the movie and it's making me nervous.