It so happened that Granby was at that moment leaning dangerously over the side of the ship endeavouring to entice a certain shark to take the bait he dangled in front of it, and the youngster, in falling, struck Granby so violently upon the neck that he too lost his hold and fell with the lad into the sea.

A loud, inarticulate cry arose from all who saw the occurrence.

"Man overboard!" shrieked some, and "A boat!" cried others. "Cutter's crew—quick, for Heaven's sake!"

Noel heard and ran to the side of the ship just in time to see Granby and the lad fall together, with a great splash, in front of the huge shark which Granby had angled for but a moment before.

Noel instantly seized the great knife which had been used by the anglers for cutting their bait.

"Out of the way there!" he shouted, elbowing aside the horrified crowd that looked down, shouting, each one, in more or less articulate horror—"out of the way! Heave a rope out, some of you, and shy things into the water to make a splash."

The concluding words of the sentence were spoken as Noel shot, head downwards, through the air. He cleft the water in a beautiful header, rising just in time to see Granby lift the lad towards the rope which willing hands above quickly dangled ready for him.

The bellowing youth laid hold of the rope, and swarmed up with amazing quickness. He was safe.

Granby was about to follow his example, when he suddenly caught sight of Noel. Up to this moment he had not known that his brother had plunged to his assistance.

Noel had dived very carefully. He had seen the huge shark disappear, probably startled, as the two human bodies fell with a great splash before its very nose; then he saw it slowly gliding forward once more, and had dived so as to emerge, if possible, at its shoulder, in order to plunge his knife into the brute's eye and blind him.