Having made sure that the deck was deserted, he climbed softly upon the fo'c'sle and proceeded to unfasten his revolver, which he had secured to the top of his head by means of a strip of cocoa fibre.

Presently he was joined by one of the natives, and at a short interval by the second. Creeping towards the open skylight the miscreant listened once more. The loud ticking of the cabin chronometer and the deep, regular breathing of the sleepers, alone broke the stillness.

Suddenly Blight perceived Mr. McKay's form lying with his head buried in his arm upon one of the seats of the cockpit. This was awkward. He raised his revolver, then reflected that ere he could reach the cabin after firing the fatal shot the occupants would be aroused.

Sprawling full length upon the cabin-top, Blight watched the slumbering victim with considerable misgivings, till realising that Mr. McKay was sound asleep, he raised himself upon his elbow, and beckoned to the two natives. Uplifting his knife, Blight made an imaginary thrust, then pointed meaningly towards the sleeper.

Just then a shark glided past the boat at barely an oar's length. Rising to the surface it turned on its back and snapped at some floating object. The sharp, almost metallic snap of those powerful jaws filled the would-be murderer with alarm. He realised that the sleeper might awake, and also that his own retreat was cut off.

The sweat poured in torrents from his brow and ran down his chalky cheeks. But the sleeping man stirred not.

Reassured, Blight again signed to the natives. Knife in hand the two glided along the narrow waterways, dropping noiselessly into the cockpit, and crept towards their unsuspecting prey.

Blight, revolver in hand, followed, stopping by the side of the cabin bulkhead, ready to dive into the cabin and complete the murderous business the moment the fatal blow was struck.

Like panthers the two natives launched themselves upon their victim, their knives flashed in the moonlight; the next instant they were buried to the hilt in the body of the sleeper.

Ere the weapons could be withdrawn, two shots rang out in quick succession. One of the natives fell face foremost across the coaming of the cockpit, the other gave a spring and plunged lifeless into the sea.