She gave a sharp moan of disappointment. “He was put there at first. But we know he was secretly removed to some other prison. Quick—we’ll find it!”

They went feverishly at the files. But suddenly both straightened up. Indistinct voices were heard in the corridor that opened into the library. In an instant the files were back in their places and all looked as before.

“I did not expect you to-day,” said a voice in the library.

“Berloff!” whispered Drexel.

“We’ll carry it off before him,” said Sonya, confidently, and she took down a volume of genealogy.

“Count Orloff was very eager you should have the reports at once,” a rumbling bass responded to Prince Berloff.

“That voice!” breathed Sonya.

“I, too, have heard it before! But where?”

The library filled with light. They crept to the half-open door. Sonya put her eyes to the crack and peered in. The next instant she had clutched Drexel with tense, quivering hands and was drawing him back. Even the deepening twilight could not hide her sudden pallor.

“Who is it?” Drexel whispered.