Once again did Jack turn his startled eyes to the left. He could not get it out of his mind how terribly suggestive that "bow" on the part of the berg had been.
There it was, coming again! Perhaps the wind had grown stronger since they dropped down upon the ice, and was adding its force to the action of the waters.
Jack found himself unable to hold in any longer. If such a dreadful peril hung over them it was time his companions knew the need of haste in getting free from that doomed field of ice. So he put all doubts behind him and gave tongue.
"Hurry, hurry, Tom! The iceberg is acting queerly. It's tottering as if ready to roll over on us! Don't you see how it acts, Tom?"
CHAPTER XXII
WHEN THE ICEBERG ROLLED OVER
Fortunately Tom had everything ready for an immediate start, acting under orders, Jack and Beverly having previously changed the position of the big plane, so that it now faced the run taken when landing.
This brought the wind back of them; but that would be an asset rather than a detriment. They had also gone hastily over the course to make absolutely certain there was no break, or other trap, which might give them serious trouble.
"Jump aboard, both of you!" cried Tom, still keeping his head—a lucky thing, since to get "rattled" in such a crisis might prove fatal.
The beating of the engine and the whirr of the propellers announced that they were off. On the comparatively smooth ice it was easy to make a start unassisted by mechanics or hostlers.