“I don’t know just what to do,” was the puzzled answer. “I wish they’d give us some sign.”
The boys and the professor were eagerly watching the submarine. All seemed silent aboard her.
Suddenly, though, there was a commotion in the water near what was evidently her stern. There appeared white foam, and a moment later the strange craft began to move through the water, in the position known as “awash,”—that is, with the deck just showing.
“There she goes!” cried Bob. “She’s seen us and off she goes!”
“Yes, and we’re going after her!” responded Jerry, fiercely, as he pulled the lever that speeded up the great propellers. “Boys, we’ll see if we can solve this mystery. We’ll try to catch this boat and see what she’s doing over here!”
On shot the Comet, about a hundred feet in the air, while, down below her, the submarine plowed through the water. The strange pursuit was under way.
[CHAPTER XV]
A BOLT FROM THE SKY
“Are we gaining on them, Jerry?” asked the professor eagerly, when the chase had been on for several minutes.