This was a cheering thought, and the two companions swam gaily along in the best of spirits. Sammy would have liked to stop occasionally to examine some particularly interesting object, but his guide hurried him on. “For,” said he, “this is by far the most dangerous part of our voyage. The most vicious of our enemies lurk outside of Coral-Land waiting for a chance to grab the tourist, but, once inside that long reef that you see some distance ahead, and we are safe. I have a special entrance known to myself alone, and no very large fish, or shark can get through it. I only hope that we can reach it without being seen.”

But it was a vain hope. No sooner were the words uttered, than some instinct caused the Pilot to glance hastily behind him, and there, well in the rear to be sure, but moving towards them with uncomfortable swiftness, were two large, dark moving bodies.

“Sharks!” cried Sammy in terror.

“Sword-Fish!” said the more experienced Pilot. “Follow me and swim for your life!”

Away he darted, heading in a straight line for the high reef, away darted Sammy after him, and on came the murderous Sword-Fish. Faster and faster swam the pursued, and faster and faster the pursuers. On they came, nearer, nearer and still nearer, their huge shapes and cruel swords suggesting a fearful death.

Sammy’s strength was almost gone, his fins were growing weaker, and he swam more and more slowly, while the mouth of the monster nearest him watered in eager anticipation.

But the dauntless Pilot still kept on his course, and showed no sign of weakening. Straight at the large reef, now very near, he dashed, and then, just as destruction seemed certain, he swerved to the right and disappeared from view in a mass of weeds that grew out from the rock. With one last desperate effort Sammy followed, the weeds closed behind him, and passing quickly through a small hole in the reef, he lay, quivering, exhausted, but safe on the other side.

Furious at their disappointment the Sword Fishes rushed at the reef, striking it again and again with their sharp swords in a vain attempt to pierce, or batter down the rock. Then they swam wildly about looking for an entrance large enough for them to pass through, but none was to be found, for the high, circular reef shut in the lagoon where the two refugees lay, like a wall.

At length, tired out with their exertions, the two Sword-Fish gave up the chase, and being in a very ill-temper, and having no one else to vent it on, they began to quarrel with each other.

“It’s all your fault anyway,” snarled Slasher, the biggest and crossest fish. “How often have I told you to take my advice in these matters! We should have kept further under water, as I suggested in the first place, then we would not have been seen so soon. I’ve no patience with your stupidity!”