IA #88: The Black Book (1949)

 Reign of Terror (1949) on IMDb

This French Revolution thriller, sometimes called Reign of Terror, stars Robert Cummings as Charles D’Aubigny, who searches for Maximilien Robespierre’s black book containing the names of those he intends to denounce and have executed.

I guess this is one of those old Hollywood movies where a very American actor is supposed to look like he comes from another background, because I never thought Cummings seemed very French. But Leonard Maltin and the IMDb users both rate it as a solid movie, so it ranks in the Internet Archive Top 100.