about that the next time the Professor sent into town for supplies, his order included a mousetrap—not one of the vicious kind that kills, but one of the wire-cage kind. And it had not been set, with cheese, for more than ten minutes before Mitkey's sharp little nose had smelled out that cheese and he had followed his nose into captivity. Not, however, an unpleasant captivity. Mitkey was an honored guest. The cage reposed now on the table at which the Professor did most of his work, and cheese in indigestion-giving abundance was pushed through the bars, and the Professor didn't talk to himself any more. "You see, Mitkey, I vas going to sendt to der laboratory in Hardtford for a vhite mouse, budt vhy should I, mit you here? I am sure you are more soundt und healthy und able to vithstand a long chourney than those laboratory mices. No? Ah, you viggle your viskers und that means yes, no? Und being used to living in dargk holes, you should suffer less than they from glaustrophobia, no?" And Mitkey grew fat and happy and forgot all about trying to get out of the cage. I fear that he even forgot about the family he had abandoned, but he knew, if he knew anything, that he need not worry about them in the slightest. At least not until and unless the Professor discovered and repaired the hole in the refrigerator. And the Professor's mind was most emphatically not on refrigerators. "Und so, Mitkey, ve shall place this vane so—it iss only of assistance in der landing, in an atmosphere. It und these vill bring you down safely und slowly enough that der shock-absorbers in der movable combartment vill keep you from bumping your head too hard, I think." Of course, Mitkey missed the ominous note to that "I think" qualification because he missed all the rest of it. He did not, as has been explained, speak English. Not then. But Herr Oberburger talked to him just the same. He showed him pictures. "Did you effer see der Mouse you vas named after, Mitkey? Vhat? No? Loogk, this is der original Mitkey Mouse, by Valt Dissney. Budt I think you are cuter, Mitkey." Probably the Professor was a bit crazy to talk that way to a little gray mouse. In fact, he must have been crazy to make a rocket that worked. For the odd thing was that the Herr Professor was not really an inventor. There was, as he carefully explained to Mitkey, not one single thing about that rocket that was new. The Herr Professor was a technician; he could take other people's ideas and make them work. His only real invention—the