"We won't unless you hurry," said Jack.
"But those two Germans. Won't they be picked up and give the alarm?"
"One of 'em won't," said Jack, grimly, "and I feel pretty safe about the other, too. Let's get up in the air."
Frank tinkered with the motor and took a firm grip on the wheel. But the hydroplane did not move.
"Something wrong," said Frank, quietly.
"What?" demanded Jack.
"Something wrong with the motor. It won't work."
Frank had bent over and was examining it carefully.
Came a shot from the German torpedo boat.
"If we don't get out of here pretty quick," said Jack, quietly, "we won't get out at all."