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 and around Bayport, but no one recollected having seen their father on the day in question. At the railway station they ascertained the fact that the detective had not bought a train ticket that day or any day since. The agent admitted it was barely possible that Fenton Hardy might have taken a train and paid his fare on board, but said it was not likely. Inquiries at the steamboat office brought a similar response. The detective had not been seen.

None of the local police officers remembered having seen Mr. Hardy that morning. The detective was a well-known figure in Bayport and it seemed strange that no one had seen him about the streets of the city, in spite of the fact that he had left home at an early hour. The boys questioned every one who was likely to have seen him, even to milkmen who might have been on their routes at that time, but the further they pursued their inquiries the deeper the mystery became.

One of the boys greatly interested in the disappearance of Mr. Hardy was Perry Robinson. Perry was the son of Henry Robinson, who had once gotten into difficulties over the disappearance of some valuables, as related in "The Tower Treasure." All of the Hardys had done much for the Robinson family, and the Robinsons were correspondingly grateful.

"I saw your dad on the street one day,