But the outlaws were not to win a foothold upon that inimical planet easily, nor were they to hold it without effort. Through the weird vegetation of the circle's bare edge there scuttled and poured along a horde of the metal-studded men--if "men" they might be called--who, ferocity incarnate, rushed the robot line. Mowed down by hundreds, still they came on; willing, it seemed to spend any number of lives in order that one living creature might once touch a robot with one outthrust metallic stud. Whenever that happened there was a flash of lightning, the heavy smoke of burning insulation, grease, and metal, and the robot went down out of control. Recalling his remaining automatons, Roger sent out a shielding screen, against which the defenders of their planet raged in impotent fury. For days they hurled themselves and their every force against that impenetrable barrier, then withdrew: temporarily stopped, but by no means acknowledging defeat. Then while Roger and his cohorts directed affairs from within their comfortable and now sufficiently roomy vessel, there came into being around it an industrial city of metal peopled by metallic and insensate mechanisms. Mines were sunk, furnaces were blown in, smelters belched forth into the already unbearable air their sulphurous fumes, rolling mills and machine shops were built and were equipped; and as fast as new enterprises were completed additional robots were ready to man them. In record time the heavy work of girders, members, and plates was well under way; and shortly thereafter light, deft, multi-fingered mechanisms began to build and to install the prodigious amount of precise machinery required by the vastness of the structure. As soon as he was sure that he would be completely free for a sufficient length of time, Roger-Gharlane assembled, boiled down and concentrated, his every mental force. He probed then, very gently, for whatever it was that had been and was still blocking him. He found it--synchronized with it--and in the instant hurled against it the fiercest thrust possible for his Eddorian mind to generate: a bolt whose twin had slain more than one member of Eddore's Innermost Circle; a bolt whose energies, he had previously felt sure, would slay any living thing save only His Ultimate Supremacy, the All-Highest of Eddore. Now, however, and not completely to his surprise, that blast of force was ineffective; and the instantaneous riposte was of such intensity as to require for its parrying everything that Gharlane had. He parried it, however barely, and directed a thought at his unknown opponent. "You, whoever you may be, have found out that you cannot kill me. No more can I kill you. So be it. Do you still believe that you can keep me from remembering whatever it was that my ancestor was compelled to forget?" "Now that you have obtained a focal point we cannot prevent you from remembering; and merely to hinder you would be pointless. You may remember in peace."