"So am I," she declared. "What can I do for you, Colonel Halsey?"

His smile faded at once. His glance included us all. "Just this. There is a man here in Greater New York, a Martian whom they call Set Molo. He has a younger sister, Setta Meka. Have any of you heard of them?"

We had not. Halsey went on, slowly now, apparently choosing his words with the greatest care. "There are things that I can tell you and there are things that I cannot."

"Why not?" asked Venza.

"My dear, for one thing, if you are going to help me you can do it best by not knowing too much. For another, I have my orders; this thing concerns the very highest authorities, not only of the U.S.W., but in Ferrok-Shahn and Grebhar too."

He paused, but none of us spoke. Then Halsey said quietly, "Well, this Martian and his sister are here now in Greater New York. They have some secret. They are engaged in some activity, and I want to find out what it is. I have picked up only little parts of it."

He stopped; and out of the silence Snap said, "If you don't mind, Colonel Halsey, it seems to me you are mostly talking in code."

"I'm not, but I'm trying to tell you as little as possible. You, Miss Venza, need only understand this: the Martian, Molo, must be induced to give you some idea of what he is doing here."

"And I am to induce him?" Venza asked calmly.

"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."