"By Jove!" said Jack, "you must have got them both. Let's go and have a look."
Slowly, Frank started the hydroplane and they bore down on the enemy.
Now they were two hundred, then one hundred yards away.
"Must have got them, all right," said Frank. "I——"
The flash of a revolver from the disabled craft interrupted him. It was closely followed by another and then two more.
With a sudden move, Frank changed the course of the hydroplane. He felt a sharp pain in his left shoulder.
"Got me," he called to Jack.
The latter was alarmed.
"Where?" he demanded.
"Left shoulder," said Frank, quietly. "Nothing serious, though."
Jack levelled his revolver and fired rapidly at the enemy. His pains were rewarded by howls of derision.