How were these two men connected? That was the question that bothered Bob. He felt that there was some connection between them, and yet why should one of them be locked in the second story of a house while the other one put a bomb under it and burned it up? Perhaps after all it was as Sergeant Riley had suggested.
"Come on, boys; we'll go home," exclaimed Mr. Cook.
"Thank yez for coming with us," said Sergeant Riley, as Mr. Cook and the two boys rose to their feet preparatory to leaving.
"Not at all," said Mr. Cook cordially. "If there is anything further we can do to help, please call on us."
"I will," said the sergeant. "Thank yez again."
"And don't forget to let us know what Mr. Wernberg has to say."
"I won't."
They went out and got into the automobile and a few moments later were home again.
"After you put away the car, I want you to take a note down to the Wernbergs for me," said Mr. Cook to Bob as he mounted the steps of the house.
"To tell them what happened to Mr. Wernberg?"