The following is a link to a film made possibly in the 1930’s (?) in the Congo. It is about a group of Batwa (Pygmies) who build a bridge spanning a river teeming with crocodiles. It was produced by Castle Films for their series “The Adventure Parade”. The narration is condescending but the film is worth that annoyance.
Click here: http://www.archive.org/details/african_pygmy_thrills