A little later came an extra heavy blast of wind. There followed a great crashing, and in an instant a big tree fell directly over the opening, cutting off much of the light above. One of the tree branches pressed down on Dave's head, forcing him to a sitting position in the hole. "This is the worst yet!" he muttered, after he realized that he was not harmed. "Now I am a regular prisoner. I can't move that tree, that's sure!" By the aid of the tree limb the young diver crawled upward until he reached the trunk across the opening. The branches were so thick he had to literally force his way along. The opening was almost closed by the big tree trunk, but to one side there were several loose rocks, and after an effort he succeeded in shoving them into the hole and thus making a place through which he crawled, although, not without great difficulty. He was now free once more, and despite the fury of the elements set off for the camp with all speed. To travel was not easy, and often he had to make a detour in order to avoid a fallen tree or a deep pool of water. He was still a short distance from camp when there came another terrific whirl of wind that sent tree limbs flying in all directions. One struck Dave on the shoulder and hurled him flat. "Phew! this is awful!" he muttered, and then stopped short, as a cry from a distance reached his ears. "Help! help!" came in Doctor Barrell's voice. "Help, or I shall be killed!" CHAPTER XXII WHAT THE STORM BROUGHT As quickly as he could Dave picked himself up once more and hurried into the camp. Here he ran into Captain Broadbeam. "Hullo, did you call?" asked the captain. "No, it was Doctor Barrell," answered the young diver. "Where is he?" For reply came another call from the scientific man, and now they located him down near the shore of the ocean. He was lying on his back, with a small tree pressing him down into the sand. The waves were sending their spray flying over him. It was but the work of a moment to lift the tree. While Captain Broadbeam did this, Dave helped the doctor to crawl to a point of safety. "Ugh! what an experience!" muttered Doctor Barrell, as he gave a shudder. "Thank you for rescuing me." "How did it happen, doctor?" questioned Dave. "I came out to look for you. Just as I reached the spot the wind sent the tree down and over me. I am thankful that I was not killed." All hurried into camp, and here Dave told his story. Then they had to watch out, fearful that the storm would do them further injury. But the wind went down as rapidly as it had come up. The rain, however, continued, and did not cease until noon of the next day. "I don't want to encounter many such storms," said Dave, when the sun shone once more. "You'll have to put up with them, if you remain in the tropics," answered Captain Broadbeam.