"If it's possible. I'm almost ready to go out now and have a search for the motor boat, but I think we'd better go back and tell him what happened."
"Tell who, the doctor?"
"No, this lad—the one who's at our house. He may know the man when we describe him."
"That's so. Paul, the man said his name was. Wonder what the other half was?"
"Guess you'll have to take it out in wondering. Come on back to the house."
It was a great disappointment to Frank and Andy when, after detailing their adventure with the queer man, and describing him minutely, to have the rescued lad say:
"I'm sorry, boys, but I can't recall any such man."
"Try hard," suggested Frank.
"I am trying," and the youth frowned and endeavored hard to concentrate his thoughts. "No, it's useless," he added with a sigh. "My memory on that point, if I ever had any, has gone with the rest of the past. It's too bad. I wish I could remember."
"Well, don't try any more now," said Frank quickly, as he saw that the youth was much distressed. "We'll do our best to help you out. And the first thing we'll do will be to look for that motor boat—that is, if she's still floating."