CHAPTER XXXII.
THE CAVE OF PEARLS AT LAST.
Had I stopped suddenly in my rolling I must have been seriously injured, but nothing lay in my way, and on and on I went until the bottom of the vast lava incline was reached, and I found myself lying on a level bed several hundred yards in extent.
I was dazed and bewildered, and it was fully a minute before I felt like picking myself up. Then I shook myself to see if any bones were broken.
"Mark, where are you?" The cry came as if from the clouds, and looking up I saw Dan and Oliver standing where I had stood but a few minutes before.
"Look out!" I yelled, but my warning came too late. The lava tilted once more, and down they came, each clasped in the other's arms, and going over and over like a barrel. Somehow, I felt like laughing, yet the happening was a serious matter.
"Well, I'm blowed!" gasped Oliver, when he
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