I colored this myself (download a page to color here) looking at posters from Houdini's era. Lots of art deco, airbrushed shapes and textures began showing up in what I found. One of the more interesting things I learned about Houdini is that he insisted on explaining to his audience that superstition and magic have no part in his performance. "My brain is the key that sets me free" - Harry Houdini.
Here's the final version of the poster. I pulled heavily from art nouveau to make this so complicated lines are ok here. It is easy to overwork a project sometimes and my original idea of working line art into the lettering took it to that point - so I left it out in the final.