Harry Behn

Inspector Marotte, attending an auction of rare collectible books previously ownded by the recently murdered M. Le Duc de Poisse, hopes he can catch his old nemesis Prahec, a murderer and book thief. More murders occur at the deceased's estate when it is learned that a rare first edition of the Gutenberg Bible is hidden on the premises. Among all the friends, relatives, and servants gathering at the estate, Marotte is finally able to reveal the identity of Prahec and apprehend the guilty. (imdb)

Two brothers attending Oxford enlist with the RAF when World War I breaks out. Roy and Monte Rutledge have very different personalities. Monte is a freewheeling womanizer, even with his brother's girlfriend Helen. He also proves to have a yellow streak when it comes to his Night Patrol duties... (imdb)

Rinty braves the elements to rescue heroine Nina Quartero from the villains, a gang of cutthroats and thieves. The doggie hero also comes to the aid of little Davey Lee. Rinty's first talkie.

The idle son of a rich businessman joins the army when the U.S.A. enters World War One. He is sent to France, where he becomes friends with two working-class soldiers. He also falls in love with a Frenchwoman, but has to leave her to move to the frontline (imdb)

The snooty Fernanda decides to visit her uncle in Frisco to escape the attentions on Don Diego but he follows her. Alone in Frisco with her duena, Fernanda can't get over the Frisco "mountains" but likes the hilltop mansion with many bathrooms. She is rescued from a wild taxi ride by a passerby who owns a huge plumbing company. Of course Fernanda thinks he is a common plumber and snubs him.