ilence. The taxi chugged steadily past unnoticed beauties and colorings. Rio is really one of the most beautiful cities in the world.

"It's like this," said Jamison jerkily. "Seven Service men vanish and one goes mad. You get two tips that the fate of Ortiz is the fate of the seven men—eight, in fact. We find that two men dispense a certain ghastly poison in two certain cities, at the orders of a man they call The Master. We find that those two men wield an astounding lot of power, and we know they're only deputies, only subordinates of the Master. We know, also, that the Service men vanished all over the whole continent, not in just those two cities. How many deputies has The Master? What's it all about? He wanted treason of Ortiz, we know. What does he want of the other men his deputies have enslaved? Why did he poison the Service men? And why—especially why—do two honorable men, officials of two important nations, want to tip off the United States Government about the ghastly business? What's it got to do with our nation?"

Bell flung away his cigarette.

"That last question has occurred to me too," he observed, and carefully repressed a slight shiver. "I have made a guess, which is probably insane. I'm going to see Ribiera this afternoon."

"He already suspects you know too much," said Jamison without expression.

"I am"—Bell managed the ghost of a mirthless smile—"I am uncomfortably aware of it. And I may need an antidote as badly as Ortiz. If I do, and can't help myself, I'll depend on you."


amison growled.