Continuity mistake: When Francis Fryer throws the cowboy he loses the scarf in his hand but when the camera angle changes he has it again.
Continuity mistake: Houdini's grey on his temples changes dramatically between shots. For example, when he finally goes to Von Schweger's home, when he knocks on the door his temples are mostly white. Then when he enters the home, he has almost no white on his temples. Then in the following scene his temples are mostly white again.