Ranworth assented. The seaman, taking a rifle from the rack, methodically adjusted the back sight. Then, unscrewing one of the two after scuttles, he rested the rifle upon the brass rim.

"Missed, by smoke!" he cried. "My own fault; the rattle of the scuttle did it. I ought to have known better."

Again levelling the weapon, Rogers took good care to hold it so that it did not come in contact with the vibrating metalwork. This time the bullet found a billet in the leather-like hide of the whale's back.

Infuriated by the pain, the animal thrashed the water with its tail and dived, only to reappear after a brief interval, and hold doggedly in pursuit.

"Can you get any more out of the motor?" asked Ranworth through a voice tube.

"She is doing her utmost, sir," replied Leslie.

The whale was now within fifty feet of the after part of the Bird of Freedom. Owing to her light displacement, and small rudder area, the latter could not manoeuvre quickly, otherwise Ranworth would have attempted to shake off pursuit by a rapid use of the helm.

To him the situation appeared serious, especially as the small rifle bullet seemed to have no effect in bringing the pursuer's progress to a standstill.

"Never fear, sir," declared Rogers confidently. "I'll get him properly plugged in half a jiffy."

His rifle cracked as he spoke. More by good luck than good judgment the bullet struck the whale fairly in the left eye. Throwing up a column of blood-tinged water the animal dived and did not reappear.