“Shove off! give way!” shouted Harold and Disco in the same breath, each thrusting with his paddle so vigorously that the two canoes shot out like arrows into the stream.

At the same instant there was a heavy plunge in the water beside the strange canoe, and the victim sank. Next moment one end of the sack rose to the surface. Both Harold and Disco made straight towards it, but it sank again, and the two murderers paddled to the shore, on which they drew up their canoe, intending to take to the bush, if necessary, for safety.

Once again the sack rose not more than three yards from Disco’s canoe. The bold seaman knew that if it disappeared a third time there would be little chance of its rising again. He was prompt in action, and daring to recklessness. In one moment he had leaped overboard, dived, caught the sack in his powerful grasp, and bore it to the surface. The canoe had been steered for him. The instant he appeared, strong and ready hands laid hold of him and his burden, and dragged them both inboard.

“Cut the lashin’s and give him air,” cried Disco, endeavouring to find his clasp-knife; but one of the men quickly obeyed the order, and opened the sack.

A groan of horror and pity burst from the seaman when he beheld the almost insensible form of a powerful negro, whose back was lacerated with innumerable ragged cuts, and covered with clotted blood.

“Where are the—”

He stopped short on looking round, and, observing that the two men were standing on the shore, seized a double-barrelled gun. The stream had carried the canoe a considerable distance below the spot where the murder had been attempted, but they were still within range. Without a moment’s hesitation Disco took deliberate aim at them and fired.

Fortunately for him and his party Disco was a bad shot—nevertheless the bullet struck so close to the feet of the two men that it drove the sand and pebbles into their faces. They turned at once and fled, but before they reached the cover of the bushes the second barrel was fired, and the bullet whistled close enough over their heads greatly to accelerate their flight.

The negroes opened their great round eyes, and appeared awe-struck at this prompt display of a thirst for vengeance on the part of one who had hitherto shown no other disposition than hilarity, fun, and good-humour.

Harold was greatly relieved to observe Disco’s failure, for, if he had hit either of the fugitives, the consequences might have been very disastrous to their expedition.