“Oh, I’m so glad I know who I am, and that I have a father!” exclaimed Paul, when word had been sent to the invalid in the sanitarium. “I thought I would never get my memory back.”

“It was the shock of seeing Shallock the second time that did it,” said Dr. Martin. “You are as good as ever now, Paul, and you won’t need any more medicine.”

And the doctor was right. The former invalid joined his father, who also recovered his health and Paul grew into a sturdy youth who had many good times with the Racer boys, and with Bob Trent. He also helped to play several jokes on Chet Sedley, the Harbor View dude, for Paul was as lively as was Andy.

“I declare I don’t know what to do with our two boys,” said Mrs. Racer in despair one day to her husband. “Here is the latest. Andy took out that Chet Sedley for a row, and dumped him overboard. Something ought to be done.”

“I suppose they ought to be sent away to school,” said Mr. Racer reflectively. “They are getting to be old enough now.”

“Yes, a good quiet school would do them good,” said his wife. “I think I know of the right place, kept by an old professor who is a very deep student. It is a nice quiet place.”

“We’ll send them there,” decided Mr. Racer. And how the Racer boys went to this same “quiet” school, and how they gave that same school a very rude, but very necessary, awakening, will be related in the second volume of this series, to be called, “The Racer Boys at Boarding School; Or, Striving for the Championship.”

Paul went back to his sick father a few days after the mystery had been cleared up, taking the important papers with him. He gave Andy and Frank the wrecked motor boat, which they brought from Cliff Island and had repaired, so that it was a fine craft. In it the brothers and Bob Trent had many a trip.

Mr. Bartlett’s health improved very much after his son joined him at the sanitarium. Though the truth about the lad’s disappearance had been kept from him as much as possible, yet something of it had to be told, and this, naturally, made the invalid worry.

“But I am all right, now that you are safe, Paul,” he said, affectionately patting his son on the shoulder. “I think I will soon be able to leave this place.”