ull benefit.

"No reason to believe so, Jack," he remarked quietly. "Tom's still of the
opinion that we ought to have it all fixed up for keeps before an hour
goes by, if things keep on working as we expect."

"Fine! You make me happy when you say that, Colin!" Jack returned. "If
only the berg doesn't roll over before we get out of this, I'll consider
that we have much to be thankful for," he added slowly.

"Could you feel any motion when you stood on that lower shelf of the
berg?" asked Beverly, showing that he had watched what Jack was doing.

"I should say I could," the other assured him. "It nearly made me
sea-sick. I'd hate to have to stay here very much longer. If you watch a
cloud passing you can see just how the peak dips, and swings back and
forth. It's getting ready to tumble, and before long!"

Tom worked on.

He too realized that the longer they were compelled to stay on the ice
field the greater their danger must become. If that towering berg ever
did turn over bottom-up it would smash the floe into fragments and churn
up the adjacent waters in a way that would leave no avenue of escape for
the trio of adventurous air pilots who had alighted there by reason of
circumstances beyond their control.

His hands felt cold, and he was compelled at times to get up and thrash
both arms about to induce circulation in his extremities. Beverly and
Jack both offered to take his place, but Tom, having started the job,
thought he had better finish it if possible.

"Everything seems to be working along as good as pie," Beverly reported,
in order to add to Jack's peace of mind, for he knew the other must be
growing a bit anxious again. Delay meant so much to Jack in this endeavor
to beat the steamship across the Atlantic.

"If you've no objections, I'll rustle after that grub bag, and indulge in
something to help get rid of this empty feeling I've got. We'll all feel
better for something to eat," said Jack. "I think Tom could work faster
if he would take time now for a sandwich."

"You're right, perhaps, Jack," returned Colin. "Although we had better
wait for a full meal till we get in the air."

"Here's luck, boys!" cried Jack a minute afterwards.

"What have you found now?" asked Tom, without looking up.

"Why, the coffee's still hot. And let me tell you, it feels good to my
hands. There never was a finer thing for poor air pilots than these
bottles that allow them to have a warm drink when two miles up, and