He took his failure without comment; only stepped back, folded his arms and burned his enemy with the frigid glare of his eyes. The Eurasian continued as if nothing had happened, addressing himself chiefly to Leithgow. "The others, too, you once knew; you are even charged with their murder. Let me introduce you once more to your old colleagues and friends. There, at the right, is the brain you once compared notes with in the person of Professor Estapp. Next to him is Dr. Swanson. To the left of Master Scientist Cram, is Professor Geinst, and this last is Dr. Sir Charles Esme Norman. Now think what this group represents! "Estapp, Chemistry and Bio-Chemistry; Swanson, Psychology; Geinst, Astronomy; Norman, Mathematics. And Cram, the master brain, of course, Physics and Electricity, although his encyclopedic knowledge encompassed every major subject, well fitting his brain for the position it holds. All this, gathered here in one! The five outstanding intellects of Earth, here gathered in one priceless instrument! Here are my advisors; here my trusty, never-tiring assistants. I can have their help toward the solution of any problem; obtain from their individual and combined intelligences even those rare intuitions which I have found almost always precede brilliant discoveries. "For they not only retain all they ever knew of science, but they can _develop_, even as brains in bodies can develop. Their knowledge does not become outmoded, if they are kept informed of the latest currents of scientific thought. From old knowledge and new they build their structures of logic once my command sets them on. Wills of their own they have none. "I have not succeeded in all my secondary alterations, however. For one thing, I have been unable to deprive them altogether of the memory of what they formerly were; but it is a subdued memory, to them doubtless like a dream, familiar yet puzzling. Because of this I imagine they hate me--heartily!--yet they lack the will, the egocentricity which would enable them to refuse to answer my questions and do my work. "Frankly, without them this whole structure"--his hands swept out widely--"my whole asteroidal kingdom, would have been impossible. Most of my problems in constructing it were solved here. And in the future other problems, far greater, will be solved here!" * * * * * Hawk Carse by now understood very well Dr. Ku Sui's purpose in bringing M. S. Leithgow to his laboratory, and was already goading his brain in search of a way out. Death was by all means preferable to what the Eurasian intended--death self-inflicted, and death that mutilated the brain--but there were no present chances that his searching mind could see. If Leithgow suspected what was in store, his face gave no sign of it. He only said: