"Well, we got out of that luckily," remarked Ned, as he looked down to where the spies were making a landing. "I guess they won't try that trick again."
"I'm afraid they will," predicted Mr. Petrofsky. "You don't know these government agents as I do. They never give up. They'll fix their engine, and get on our trail again."
"Then we'll make them work for what they get," put in Tom, who, having set the automatic speed accelerator, had rejoined his companions. "We'll try a high flight and if they can pick up a trail in the air, and come up to us, they're good ones!"
He ran to the pilot house, and set the elevation rudder at its limit. Meanwhile the spies were working frantically over their motor, trying to get it is shape for the pursuit. But soon they realized that this was out of the question, for the Falcon was far away, every moment going higher and higher, until she was lost to sight beyond the clouds.
"I guess they'll have their own troubles now," remarked Ned. "We've seen the last of them.*
"Don't be too sure," spoke the Russian. We may have them after us again. We're over the land of the Czar now, and they'll have everything
