For, strangely enough, the amateur at any science feels that he must make a large batch in order to do it at all. In electricity he wants excessive powers and lethal voltages to do that which a trained technician can accomplish with less deadly items. However--was the motive avarice or altruism? James Forrest Carroll studied them as they studied him. CHAPTER V _Kingallis_ Kingallis himself put an end to one of Carroll's worries. After several days of study, the alien doctor called him aside. "Carroll, you know that you are helpless," he said. "We know that you are helpless. The point is just this: We can study your mind better if you are not worrying. Therefore I am going to put an end to one major worry of yours. Remember, always, we know that you are studying us! "We are using the forerunner of our mental control beam to study you, Carroll. You know that. The mental educator came first, the mental control without wearing electrodes came long afterwards." "Understandable," nodded Carroll easily. "Men learned to communicate along a wire long before they used radio." "The gadget we've been using is none other than a person-to-person telepathy aid. It was first developed as a means of placing men _en rapport_ while studying a complex problem. Thus, for instance, a machinist can do a job for an electrical project while understanding perfectly just why this must or must not be done despite its mechanical desirability. "It was but a step from that to its use in educating the youth of our race. A rather complex problem, Carroll, and one that cannot be appreciated until the whole problem is studied complete with both successes and failures. "We taught then, Carroll, from a teacher-to-student plan. Later it was discovered how to record certain phases of lessons. The latter removes one main difficulty of the automatic educator." "Mind telling me what?" asked Carroll, fencing for more information. "Not at all. You see, the living hookup produces a double flow of information--which is what I meant to tell you. You are studying me as I am studying you--and, as in the case of an infant with erroneous information, you are placing errata in the teacher's mind." "All children know--from their limited visible evidence--that the earth is flat. Only deep study proves otherwise. I can see where a continued youthful insistence upon a flat earth might cause a bit of mental collision in any teacher's mind." Carroll's voice was sharp. "You have the point exactly," smiled Kingallis. "Then tell me," Carroll said suddenly, "why I cannot find out why you are suppressing the information I want?" "Because we are not studying that," smiled the alien doctor. "I surprise you? You expected me to wish my answer recalled? No, Carroll, I care not that you know some things about us."