"That is my idea." The faint shadow of a smile swept Halsey's thin, intent face. "My dear, you are a girl of Venus. More than that, you have far more than your normal share of wits and brains." It did not make Venza smile. She sat tense now, with her dark-eyed gaze fastened on Halsey's face. Anita, equally breathless, reached over and gripped her hand. Then Venza said slowly, "I realize, Colonel Halsey, that this is something vital." "As vital, my child, as it could be." He drew a long breath. "I want you to understand I am doing my duty. Doing, what seems the best thing, not for you, perhaps, but for the world." I seemed to see into his mind at that moment. He might have been a father, sending a daughter into danger. "I need not disguise the danger. I have lost a dozen men." He lighted a cigarette. "I don't seem to be able to frighten you?" "No," she said. And I heard Anita murmur, "Oh, Venza!" "But you frighten me," said Snap. "Colonel, look here; you know I'm going to marry this girl very soon." "Yes, I know. You'll have to consider this a sacrifice, a voluntary descent into danger, for a great cause in a great crisis. You four have just come out of a very considerable danger. We know of what stuff you are made, all of you." He smiled again. "Perhaps that prominence is unfortunate for you, but let me settle it now. Is there any one of you who will not take my orders and trust my judgement of what is best? And do it, if need be, blindly? Will you offer yourselves to me?" We gazed at each other. Both the girls instantly murmured, "Yes." "Yes," I said at last. It was not too hard for me, for I thought I was yielding him Venza, not Anita. Snap was very pale. He stared from one to the other of us. "Yes," he said finally. "But Colonel, surely you can tell us more." Halsey tossed his cigarette away. "I will tell you as much as I think best. These Martians, Molo and his sister, do not know of Venza; at least, I think that they do not. They apparently have not been here very long. How they got here, we don't know. There was no passenger or freight ship. In Ferrok-Shahn, they have a dubious reputation at best; but I won't go into that. "Venza, I will show you these Martians and the rest depends upon you. There is a mystery; you will find out what it is." He reached for his inter-office audiphone. "I want to locate the Martian _Set_ Molo. Francis, Staff X2, has it in charge." The audible connection came in a moment. "Francis?" We could hear the answering microphonic voice, "Yes Colonel." "Is the fellow in a public place by any chance?" "In the Red Spark Cafe, Colonel. With his sister and a party." "Good enough. The Red Spark has an image-finder. Have you visual connection?" "Yes, the whole room; they have a dozen finders." "Use a magnifier. Get me the closest view you can." "It's done, Colonel. I did it just in case you called." "Connect it."