The jaguar meat was tough and not of an extra fine flavor, yet they were tremendously hungry, and that made them less critical than otherwise. In less than an hour the dinner was over, and after getting a drink and a wash-up, both proceeded on their way. It was warm outside of the cave, so they did not suffer much inconvenience because of their wet clothing. "Now to find our way back to the _Swallow_, and with all speed," said Dave. "Which do you suppose is the right direction?" "That way," and Bob pointed with his hand. "And I was thinking it was in that direction," and Dave pointed at right angles to the other course. Then both laughed. "We can't both be right," said Bob. "Let us split the difference and take a course between the two. Then we probably won't go far wrong, Bob." "Right you are." On they went, into the valley which Bob had traversed, and then up the line of hills where they had shot the goats just after coming ashore. But now they found themselves confronted by a deep ravine, partly choked with brush and vines. "How are we going to get across that, Dave?" "We'll have to walk along the bank until we reach some crossing-place," answered the young diver. "I am not going to risk a tumble by taking a leap." "Nor I. I have had tumbles enough to last me a lifetime," and the young engineer shook his head dubiously. On they went, the way growing more perilous every moment. They were at the edge of a forest, and the top of the ravine was lined with loose rocks. Suddenly Bob, having made a leap from one rock to another, went down in a heap and gave a loud cry of pain. "My foot! My foot!" "What's the matter?" "I've caught my foot under the rock!" Dave immediately hastened forward, and saw that his chum was indeed fast. The foot was wedged in a crevice, and could not be budged until Dave rolled the rock away by main force. Then Bob grated his teeth and gave a deep groan. "My ankle! It must be broken! Oh, Dave!" And with another moan he fell back in a faint. If Dave had been alarmed before, he was doubly so now, and he scarcely knew what to do. He remembered passing a pool of water a distance back, and he ran to this, filling the water bottle Bob had been carrying. The water revived the young engineer somewhat, and in the meantime Dave cut loose his shoe. He found the injured ankle much discolored, and swelling rapidly. He bathed it, and this gave some relief, until the pain gave way to a stiff numbness. "Now I am in a pickle," groaned Bob. "Did ever anybody run up against such luck before?" "Better not try to stand yet," replied Dave. "Stand? Why, the pain would go to my very heart if I tried it!" And poor Bob gave another groan.