"Do you know where you are?" asked Will.

The escaped convict looked inquiringly at his son.

"Who is this boy?" he asked.

"A friend who has come to establish your innocence," was the reply.

"That is impossible," replied Wagner. "Every police official in Chicago is convinced of my guilt. They jobbed me to prison in the first instance and they are bound to keep me there!"

"Who were the detectives?" asked Will.

"Katz and Cullen!" was the answer.

"I see," Will said musingly.

"But we mustn't permit father to remain here," Chester cut in. "All these questions can be answered at another time."

"That's right," Will agreed. "And I'll go to the cavern and ask some of the men to carry your father out."