"Where is she?" Stan asked.

Tanner raised his eyebrows. "The North American continent. Chicago."

"Exactly where?"

"I don't know ... exactly. We've been trying to trace the radiations from the fusion package but it keeps moving about the city." Tanner grimaced. "We haven't been successful in following it. We've lost quite a number of agents trying to follow it, as you know."

He stood up and fished in his pocket for a pipe and a small pouch of tobacco. He looked very casual, very urbane, Stan thought.

"You going after her, Martin?"

"That's right—I'm going after her."

Tanner studied him curiously.

"You're taking a risk. Our agents will locate her sooner or later."

"They haven't so far," Stan said sarcastically. "Why leave it to chance?"