Mask - In the novel Marco has a different face in the beginning. This picture represents the mask that people wear when they don't want the truth to be seen. Lies can hide behind anyone, but when they take off the mask they show who that person really is.
Yes, I have tricks in my pocket, I have things up my sleeve. But I am the opposite of a stage magician. He gives you illusion that has the appearance of truth. I give you truth in the pleasant disguise of illusion (Tennessee Williams)