"That," said Hal, "is none of your business. I have my orders and I
haven't time to fool around here with you. I'm due back to-morrow night."

There was a moment's silence from the other machine and then a
voice called:

"Has your mission anything to do with Greece's intervention in the war?"

"Well, I can't say anything about that," replied the lad, thinking to
give the other the impression that it was.

"I see," was the answer shouted back. "Well, I wish you luck. Sorry you
can't tell me all about it."

"You probably will know soon enough," replied Hal.

"Good. Don't want any company, do you?"

"No, I guess not."

"You want to be careful crossing the Balkans. I understand there are some
British and French aircraft with the Serbians and Montenegrins. Look out
for them."

"I'll be on guard," replied Hal. "Thanks for the information."

"Tell you what," said the Austrian, "I've been doing some scout duty
there myself. I'll just trail along. May be able to help you out a bit"

Hal didn't think much of this plan.