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THE SHELL BANK
113
friendship which to Keith at least had become very dear.
"Miss Trent," he began, irresolutely, "if ever—"
A triangular fin shot along the surface of the water by the side of the whale-boat, just as one of the divers scrambled over the side. A huge shark snapped at his leg as it disappeared, and then, with a vicious whisk of its powerful tail, swung off.
Isa, at that moment, came to the top, a dozen feet from the boat.
Two other dorsal fins appeared from nowhere, and the black diver, with a quick glance over his shoulder, saw death in a terrible form rushing toward him.
