At sight of the cayman, Bomba, for one awful instant, felt as though he were paralyzed. Strength seemed suddenly to have left his arms and legs. But only for a moment. The next instant the instinct of self-preservation asserted itself, and he shot forward like an arrow. He knew he could not reach the shore before the dreadful thing would be upon him. But he would struggle till the last. As a final resource he had his knife. But what would that knife avail against murderous jaws armed with a score of knives? One nip from those jaws could sever his leg from his body, or, if they caught him at the waist, could bite him in half. His arms and legs were working like piston-rods. He was fairly leaping through the water. But behind him was coming a fearsome thing that could swim still faster.