With a scant ceremony in sharp contrast to his courteous words to Elza, he hurried us off. Three of us--Elza, Wolfgar and myself, with one attendant who still carried Elza's personal belongings. Hurried us into the vertical car which had brought us up into the tower. It descended now, down the iron skeleton shaft. Outside the girders I could see only the blackness of the barrage, with faint snapping sparks. Silently we descended. It seemed very far down. And suddenly I realized that we were going lower than the ground level. The barrage sparks had vanished. The blackness now was a normal darkness; and in it I could see slipping upward the smooth black sides of the vertical shaft into which we were dropping. And the sulphuric smell of the barrage was gone. The air now smelt of earth--the heavy, close air of underground. I do not know how far down we went. A thousand feet perhaps. The thing surprised me. Yet in those moments my mind encompassed it; and many of Tarrano's motives which I had not reasoned out before now seemed plain. He had come from Venus to the Earth, possibly several months ago. Had come directly here to Venia and set up his headquarters. His purpose on Earth--as he had just told me--did not lie with warfare. While he was here his forces had conquered the Great City of Venus, and just now, the Hill City of Mars. He controlled Venus and Mars--but he was still far from ready to attack the Earth. He had come to the Earth in person for several important purposes. For one--he desired the Brende model and Dr. Brende's notes. He had them now; they were, in reality, at this present moment in the Great City of Venus. Also, with the Brende secret--to control it absolutely--he had to have Georg Brende. Well, as I was soon to realize, Georg was now his captive. And the Princess Maida? His purpose in holding her was two-fold. She had, now as always in the Venus Central State, a tremendous sentimental sway upon her people. Tarrano had abducted her, forcibly to remove her from the scene of action, so that during her unexplained absence his propaganda would have more influence. He had brought her here to Earth; and now his plan was to have Georg Brende and her fall in love with each other. He still hoped to win Georg to his cause, by giving him the Princess Maida, if for no other reason. And with Maida married to Georg--and Georg in Tarrano's service--Maida herself would turn her influence in Venus to consolidate her people to Tarrano. These, in part, were Tarrano's present plans and motives. They were working out well. And--as he had said--the Earth did not concern him now as a battle-ground. Later ... But even with this sudden insight which seemed to come to me, I was inadequate to grasp what later he was to attempt.