"This should help," he remarked. "I always keep some spare gas on hand." Paul Blum, beaten, had no more to say. The Hardy boys poured the reserve supply of gasoline into the tank, and in a few minutes the engine was pounding away. Then, side by side, the two motorboats turned about and put back for Bayport. CHAPTER XVI A PLAN OF ACTION The quick work of the Hardy boys and Tony Prito in capturing Paul Blum won them many compliments within the next few days. Even Chief Collig grudgingly admitted that it had been a smart capture. In this he was perhaps largely prompted by a feeling that had Paul Blum made good his escape he, as chief, would have come in for considerable criticism from the townspeople. As it was, the laxity at the city jail was forgotten in the excitement surrounding the fugitive's return, and Chief Collig was correspondingly relieved. Had Paul Blum not been recaptured, the police force would have had to bear the brunt of public displeasure for having allowed the man to slip through their fingers. The connection of the Hardy boys with the affair caused many people to recall their previous activities in the Tower Mansion case and the affair of the house on the cliff. "Those lads will be smart detectives yet," more than one person was heard to remark. Nothing could have pleased the boys more than recognition of the fact that they showed some ability in the profession of their famous father, and, in the light of their recent successes, even Mrs. Hardy was beginning to abandon her prejudices against their desire to be some day more than amateur detectives. But although Paul Blum was safe in jail, counterfeit money was still being circulated in Bayport and Barmet village. Hardly a day passed that some one did not report to the police or to the banks that they had been the unwitting victims of the counterfeiters by cashing or accepting spurious bills. In one instance it was a garage owner who had changed a twenty dollar bill for a passing motorist who bought gasoline and oil. In another instance even the steamship ticket office had accepted a false five dollar bill for a ticket and the mistake had not been discovered until the following day. When the ticket, which was bought at a cost of eighty cents, was traced by its number it was found that it had never been presented on the steamboat. So many instances came to light that the entire city was on guard against the counterfeiters, but so excellent were the imitation bills and so plausible were the excuses of those who sought to pass them on that many people were victimized in spite of their caution.