My Space-partner was a good reliable sidekick—but his partner was something else! Once when I was doing a hitch with the Shaulan Space Guard out Scorpio way, my partner Jeff Bogart developed just about the most harmless psychosis you could imagine: he got himself an imaginary companion. And the imaginary companion turned out to be me. Well, I’m a pretty nice guy and so having two of me in the ship didn’t seem a particularly bad idea. At first. In fact there’d be advantages of it, I thought. For