urse accurately," replied Chester.

"I'm sure I have made no mistake," said Hal.

"Then we should be about there."

"About where, that's what I want to know," put in Anthony Stubbs, from
his place in the rear of the large army plane, the same in which the four
friends had made their escape from the Austrians not so many days before.
"Where are we headed for, anyway?"

"That will be a little surprise for you, Mr. Stubbs," Chester returned.

"I'm getting too old to care much about surprises," declared Stubbs.
"In the first place, I have no business in this machine, anyhow. I
never was much good when my feet were not on the ground, and I feel
pretty sick up here."

"Oh, you'll get used to that, Stubbs," spoke up Colonel Anderson.

"Don't you believe it. I've tried it before and I haven't become used
to it yet. No, sir. In the first place, a man has got no business up
here. If he were meant to fly, he'd have wings, like a bird. I claim
it's tempting Providence to go floating about through space in one of
these things."

"Well, you didn't seem to hesitate much when we asked you to come,"
commented Chester.

"Of course not. Think I want to be left alone in this benighted land,
with a couple of million Austrians likely to swoop down on it at any
minute? I guess not. The air may not be safe, but it can't be any worse
than I would have been if I were left behind to await the arrival of the
invader. But where are we going?"

"Belgrade," said Chester briefly.

Anthony Stubbs half started to his feet.

"Great Scott!" he exclaimed, and sank back again. "Out of the frying
pan into the fire. Say!" and his voice rose a trifle, "What do we want
to go to Belgrade for? What's the use of sticking our heads into a
hornet's nest?"

"Look here, Mr. Stubbs," said Hal, again turning in his seat. "Don't you
want to go to Belgrade with us? If you don't, I'll go down and let you
off here."

He reduced the speed of the craft a trifle.

"No, no. Never mind," said Stubbs hurriedly. "I was just joking. Of
course I want to go to Belgrade. They tell me that the Germans are just
about to come in. But that won't make any difference, will it? No,
indeed. Not to us. I suppose we are going to be there to welcome them.
I'll bet they'll be glad to see us."

The others smiled, but they made no reply to this outburst. They had
known Stubbs long enough now not to pay much attention to him at times.
And this was one of those times.

Stubbs n