"Fix it, first of all," replied his son. "It needs considerable
tinkering up, but nothing but what I can do, if you'll help me."

"Of course I will. Do you think you can get any speed out of it?"

"Well, I'm not so anxious for speed. I wart a good, comfortable
boat, and the ARROW will be that. I've named it, you see. I'm
going back to Lanton this afternoon, take some tools along, and
repair it so I can run the boat over to here. Then I'll get at it
and fix it up. I've got a plan for you, dad."

"What is it?" asked the inventor, his rather tired face lighting
up with interest.

"I'm going to take you on a vacation trip."

"A vacation trip?"

"Yes, you need a rest. You've been working, too hard over that
gyroscope invention."

"Yes, Tom, I think I have," admitted Mr. Swift. "But I am very
much interested in it, and I think I can get it to work. If I do
it will make a great difference in the control of aeroplanes. It
will make them more stable able to fly in almost any wind. But I
certainly have puzzled my brains over some features of it.
However, I don't quite see what you mean."

"You need a rest, dad," said Mr. Swift's son kindly. "I want you