“Bah!” The terrorist’s lean face wrinkled contemptuously. “If there was such a warning, its purpose was to frighten us and make our plan fail. We are going to stay here!”

Drexel turned to Sonya. “Come, Sonya!” he begged.

She wavered, but before she could answer the housekeeper entered with a letter for her. She tore it open.

“From Sabatoff,” she said. Then she gave a low moan of despair. “We’ve failed!”

“What does it say?” asked Drexel.

“‘Plan discovered. White One and Razoff arrested; Delwig seized. Escape!’”

“That means we have been sold to the Government!” cried Freeman.

“Yes—one of our group must have turned traitor!” cried Sonya.

The terrorist’s face grew dark. “And it’s plain who the traitor is!” He whipped out his pistol and sprang toward Drexel. “Well—he’ll never betray again!”

But Sonya threw herself before the black weapon. “He is not the traitor!” she cried. “No more than yourself!”