"Wait till I get something from the other cave to break that chain."
He hastened back to the living room.
After the lapse of a few minutes he returned with a file.
While he was cutting open the padlock, Mr. Dalton asked:
"May I ask who you are, gentlemen?"
"The Bradys," replied Harry, quietly.
"What!" gasped the prisoner, in astonished tones.
"We've been hunting for you a long time, and found you at last."
"This is wonderful!"
"Perhaps to you, but not to us."