The Knights of Arthur by Frederik Pohl, Science Fiction, Fantasy

There was three of us -- I mean if you count Arthur. We split up to avoid attracting attention. Engdahl just came in over the big bridge, but I had Arthur with me so I had to come the long way around.When I registered at the desk, I said I was from Chicago. You know how it is. If you say you're from Philadelphia, it's like saying you're from St. Louis or Detroit -- I mean nobody lives in Philadelphia any more. Shows how things change. A couple years ago, Philadelphia was all the fashion. But not now, and I wanted to make a good impression.I even tipped the bellboy a hundred and fifty dollars. I said: "Do me a favor. I've got my baggage booby-trapped --""Natch," he said, only mildly impressed by the bill and a half, even less impressed by me.