Joe Mauser occupied a small table in a corner of the Middle Caste Category Military Club in Greater Washington. His current fame, transient though it might be, would have made him welcome as a guest in the Upper Caste Club, located in the swank Baltimore section of town. Old pros in the Category Military had comparatively small sufferance for caste lines among themselves; rarified class distinctions meant little when you were in the dill, and you didn't become an old pro without having been in spots where matters had pickled. Joe would have been welcome on the strength of his performance in the most recent fracas in which he had participated as a mercenary, that between Vacuum Tube Transport and Continental Hovercraft. But he didn't want it that way.