Haunted Mansion

You find yourself in what looks like a den/office. A large desk made of oak is besides the window - and being the curious sort, you wander over to it and flip through some of the loose papers that are scattered about the desk. As your rifle through the papers, something falls out....

As you gather up the goodies, a loud THUMP - like someone or something hitting the wall, comes from outside. Seeing the french doors off to the right, do you....