“Don’t be too sure,” warned Grant.
“He’ll attack soon if he’s going to, though.”
“Yes, he’ll have to. The water gets pretty shallow in a little closer.”
“Look at Sam,” exclaimed Fred. “He’s sending John on ahead of him.”
“John must be pretty tired now.”
“I should think so.”
“He’ll be all right in a minute, though. A few more yards and he’ll be out of danger.”
“There goes the shark again,” cried Fred suddenly. “This is about his last chance and it won’t be so easy to drive him off this time.”
Around and around the two swimmers the shark circled. He moved with amazing rapidity, and it seemed as if the two hard-pressed and tired swimmers must become dizzy if they followed his every move.
“He’ll fly around them like that,” said Grant, “until he sees a good chance and then you’ll see him strike like lightning.”