Half sickened with suspense, I watched what followed: a drama played out in the limpid water beneath our boat. Grasping in his right hand a keen broad-bladed knife, my uncle shot down so fast that half-way to the bottom he overtook his monstrous antagonist. The shark was still intent upon Ofai; I saw him start and turn with a sweep of his tail as the man's body struck him and the thrust of a powerful arm sent the knife deep into his side. A pink cloud of blood gushed from the wound, and at that moment I saw Ofai emerge from his hiding-place, seize the rope, and bound toward the surface of the lagoon. The diver's lungs must have been nearly bursting, and he mounted the rope with desperate speed. Now he was close to my uncle. The shark had circled, turning on his side with a livid gleam of his under parts, and was coming straight at the native. The monster reared--again I saw Uncle Harry raise his arm, saw the long knife sink home and the water reddened by a cloud of blood. The respite had been enough for Ofai; his head broke water with a gasp, and before a hand could be raised to help him he had seized the gunwale and was over the side of the boat. My uncle was in desperate straits. He had been under water nearly a minute and was still eighteen or twenty feet beneath the surface. Fatu and Ivi were brave men and devoted to him, but it would have been insanity to think of going to his rescue now. I heard Fatu's voice, unreal and far-off, shouting to the men to move to the other side of the boat; I felt the boat list, and saw, out of the corner of my eye, the gigantic figure of the mate standing on the seat beside me, bent almost double as he watched the scene below. Uncle Harry had dropped the weight at the first attack, and now, still grasping his knife, he made for the rope and seized it with his left hand. The shark had darted away as he felt the steel for the second time, but now he was returning straight for the antagonist he seemed to recognize at last. Moving with horrid deliberation, he reared almost vertically beneath the swimmer, and opened his great jaws. My uncle stopped himself with his left hand on the rope, gathered his body together, and drove the knife into the broad rounded snout beneath him--the shark's most vulnerable point. For a moment the monster lay stunned and motionless, and in that moment Uncle Harry nearly reached the surface of the lagoon. Fatu was bent double, his hands already in the water. Then the shark seemed to regain his senses and came rushing upward grimly. I saw the muscles of the mate's arms standing out as though cast in bronze, I saw the swimmer's goggled face within a yard of the surface, and the great fish charging with open jaws, fearfully close behind. Then the whaleboat lurched as Fatu plunged his arms deep into the water, seized my uncle and swung him up and inboard with a single mighty heave.