“Don’t be silly,” grinned Paul, who was now quite used to the English children’s teasing ways. “You’re all wrong — he’s given me an aeroplane of my very own!”

The four children stared at Paul in the greatest surprise. The knew that Paul’s father was a rich king — but even so, an aeroplane seemed a very extravagant present to give to a small boy.

“An aeroplane!” said Mike. “Golly — if you aren’t lucky, Paul! But you are too young to fly it. It won’t be any use to you.”

“Yes, it will,” said Paul. “My father has sent me his finest pilot with it. I can fly all over your little country of England and get to know it very well.”

“Paper! Evening paper! Lost aeroplane found! White Swallow found!”

With a yell the four children rushed down the stairs to buy a paper. But what a dreadful disappointment for them! It was true that the White Swallow had been found — but Captain and Mrs. Arnold were not with it. They had completely disappeared!

The children read the news in silence. The aeroplane had been seen by one of the searching planes, which had landed nearby. Something had gone wrong with the White Swallow and Captain Arnold had plainly been putting it right — then something had happened to stop him.

“And now they’ve both disappeared, and, although all the natives round have been questioned about them, nobody knows anything — or they say they don’t, which comes to the same thing,” said Peggy, almost in tears.

“I wish to goodness we could go out to Africa and look for them,” said Mike, who hadn’t really much idea of how enormous a place Africa was.

Prince Paul slipped a hand through Mike’s arm. His eyes shone.