What is ephemera? How do we catalogue it? Every library’s ephemera collection differs greatly from others in its content and cataloguing needs. Does one dictate the other? Is there a right way and a wrong way? Or just a way that is right for the library and material in hand? A look at how these things were approached at the Wellcome Library gives an example of how a successfully ordered collection can be created out of the initial chaos with just a little forethought and a lot of hard work.