"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.
"I guess that will be the best way," said Hal. "You first, Uncle John."
The three hurried to the window, and Uncle John put a leg over the sill. As he did so a sharp shot rang out and Uncle John withdrew his leg hurriedly. He tumbled over to the floor, and seizing his foot in his hand, rocked himself back and forward.