The Exposure CHAPTER XXI. On the Back Trail CHAPTER XXII. Dave and the Mountain Lion CHAPTER XXIII. In the Mountain Cave CHAPTER XXIV. Searching for the Landslide Mine CHAPTER XXV. Caught in a Storm CHAPTER XXVI. Prowlers in Camp CHAPTER XXVII. The Two Prisoners CHAPTER XXVIII. The Lost Landslide Mine CHAPTER XXIX. Another Landslide CHAPTER XXX.