That is to say, the whirlpool was on what might
be termed a slant. At one time the boat would be at the lowest
point, and at another at the highest point. At the low point the
occupants of the craft were out of sight of everything, as when a
ship is in the hollow of the sea. A little later they would be
raised up on a crest of water so that they could look to the
distant hills.
"If we could only get power enough to shoot the boat out at an
angle when it gets to the high point, we could escape," thought
Jack.
But how could he obtain this power? The mechanism seemed to be
working at the greatest force, for, after an attempt had been
made to stay the progress of the boat by reversing it, Mr.
Roumann had again put on full speed ahead.
But was it full speed? That was what Jack wanted to know.
He examined every inch of the box. At first he saw nothing but
the three knobs that had been used. Then, all at once, down
underneath, he saw a small pin. It looked as if it could be
moved. He took hold of it.
"I wonder what will happen if I pull it out or push it in?" he
asked himself.
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