"Find it?" asked Chester, walking over to him.

Hal extended a paper.

"I guess this is it, all right," he said, and thrust the document into
his pocket.

At that moment there came a startled cry from Uncle John, followed by
a heavy thud. Hal and Chester wheeled quickly, just in time to see
Robard disappearing through the door, which closed after him with a
bang. A key turned in the lock. The thud they had heard was Uncle John
toppling to the floor as the result of a blow delivered by the
Austrian, who, catching Uncle John off his guard, had sprung to his
feet and attacked him.

Hal jumped to the door, while Chester bent over Uncle John and assisted
him to his feet.

"The scoundrel!" exclaimed Uncle John. "He took me by surprise. He gave
me no warning."

"Surely you didn't expect him to," said Chester, somewhat angry.

Hal sprang to Chester's side.

"Quick!" he exclaimed. "We must get out of here. Robard will have
assistance in a moment."

"Which way? Out the window?" asked Chester.