In a short time the motor boat reached the drifting Fairy. Mr. Brown and Captain Ross went on board, and you can just imagine how glad Bunny and Sue were to see them.
"Guess you'll have to tow us back," said Captain Ross to Mr. Brown. "The motor of my boat needs fixing. That's one reason why I tied up at your dock. There isn't enough wind to blow us back against the tide that's running out now."
"My motor boat will tow you back all right," said Mr. Brown.
And while this was being done Bunny and Sue sat on the deck of the Fairy with their father and Captain Ross.
"Well, you had quite an adventure, didn't you?" laughed Captain Ross, taking Sue up on his knees. "And it reminds me of a riddle. When is a boat not a boat?"
"When is a boat not a boat?" repeated Bunny. "Why, a boat is always a boat, Cap'n Ross, lessen you mean it's like a house 'cause people sometimes live in it."
"No, I don't mean that," chuckled Captain Ross. "I'll ask you again. When is a boat not a boat? Can you guess?"
Bunny and Sue shook their heads sideways to say "No."
"Do you give up?" asked Captain Ross.
Bunny and Sue shook their heads up and down to say "Yes."