"If you don't mind," Collins said, with a persuasive mile, "I'll walk with you if you are going out to your aeroplane. I've been to bed and find that I can't sleep."

"All right," Ned replied, thinking that he would rather have the man with him than on his way to report the departure of the Nelson. "We are just going to look the ship over—perhaps take a little spin. Come along."

"I should like very much to go with you, in case you decide to go sailing tonight," Collins said. "Perhaps you may be able to arrange it?"

"I'm afraid not tonight," Ned replied, wondering just what this new acquaintance was up to. "However," he added, "you may as well come along and look over the ship."

Collins seemed glad of even this slight concession on the part of the boy, and walked along briskly. Presently, however, he began to fall back, talking with Jimmie, who was a few paces behind. Then, before very long, the little fellow missed Collins. He had disappeared in a dark alley. Ned worried over this when informed of the fellow's strange and contradictory conduct. The man might have gone to make report to the other aviator! This was not a pleasant reflection.

Mike was found sitting in front of the Nelson, talking with a native who was trying to learn all about an aeroplane from, a boy who knew nothing about it himself! It took only a short time to make ready for flight, then the Nelson was up and away, making little noise as she cut the air, her great planes flashing in the light of the moon.

"This is pretty poor, I guess!" Leroy exclaimed, glancing over the mighty map of sea and plain and mountain. "How fast do you want to go?"

"At full speed," Ned replied.

"I should say it would be full speed!" Jimmie said, half covering his mouth with his hand, to keep his words from being blown back down his throat. "That is," he added, "if you want to make a sneak!"

Ned turned away to the north and saw the white planes of the strange aeroplane gleaming in the moonlight. She seemed to stand still for an instant, and then sped off to the southeast. Ned sighed with apprehension, but Leroy laughed.