Still, Frank was ordinarily a cool-headed fellow, and accustomed to
weighing chances somewhat before imperiling his life. In this case, of
course, he knew that more or less risk must be taken if they hoped to
save the sleeping balloonist.

One look they took in at the front door. The whole place was ablaze.

"Get out of the way, boys; we're going to put the hose in there!" cried
one of the wearers of the fire-hats and coats, as he advanced.

"No chance there!" exclaimed Frank, in despair, as he moved back.

Jerry clutched his arm.

"Come along with me. Perhaps the back stairs may not be burning, yet.
They happen to be further along toward the safe side. There's a chance!"
he panted.

Half a minute later they had turned the corner, and were close to the
rear exit.

"See, the smoke is coming out, but no fire. Shall we risk it?" asked the
eager Jerry.

Frank swept a quick look above and around. He was weighing the thing in
his mind, so that they might not be carried by impulse to their doom.

"It's worth while. At the worst we can jump into that tree from the
window. And it's just terrible to think of the professor sleeping on
until he is caught. Lead the way, Jerry; you know about it better than