It was incomprehensible.

And the money in the vault, the yellow bills hanging from a cobweb of strings; why should they terrify her; what did they threaten? Dully, and from a distance, Monica heard the voice of Peabody.

"No," he answered; "I have caught you! And I've had a hell of a time doing it!"

Monica tried to call out, to assure her brother of her presence. But, as though in a nightmare, she could make no sound. Fingers of fear gripped at her throat. To struggle was no longer possible.

The voice of Peabody continued:

"Six months ago we traced these bills to New Orleans. So we guessed the plant was in Central America. We knew only one man who could make them. When I found you were in Amapala and they said you had struck 'buried treasure'—the rest was easy."

Monica heard the voice of her brother answer with a laugh.

"Easy?" he mocked. "There's no extradition. You can't touch me. You're lucky if you get out of here alive. I've only to raise my voice—"

"And, I'll kill you!"

This was danger Monica could understand.