| CHAPTER I. | NATURE IN TRAVAIL. |
| CHAPTER II. | PROFESSOR FEATHERWIT TAKING NOTES. |
| CHAPTER III. | RIDING THE TORNADO. |
| CHAPTER IV. | THE PROFESSOR'S LITTLE EXPERIMENT. |
| CHAPTER V. | THE PROFESSOR'S UNKNOWN LAND. |
| CHAPTER VI. | A BRACE OF UNWELCOME VISITORS. |
| CHAPTER VII. | THE PROFESSOR'S GREAT ANTICIPATIONS. |
| CHAPTER VIII. | A DUEL TO THE DEATH. |
| CHAPTER IX. | GRAPPLING A QUEER FISH. |
| CHAPTER X. | RESCUED AND RESCUERS. |
| CHAPTER XI. | ANOTHER SURPRISE FOR THE PROFESSOR. |
| CHAPTER XII. | THE STORY OF A BROKEN LIFE. |
| CHAPTER XIII. | THE LOST CITY OF THE AZTECS. |
| CHAPTER XIV. | A MARVELLOUS VISION. |
| CHAPTER XV. | ASTOUNDING, YET TRUE. |
| CHAPTER XVI. | CAN IT BE TRUE? |
| CHAPTER XVII. | AN ENIGMA FOR THE BROTHERS. |
| CHAPTER XVIII. | SOMETHING LIKE A WHITE ELEPHANT. |
| CHAPTER XIX. | THE CHILDREN OF THE SUN GOD. |
| CHAPTER XX. | THE PROFESSOR AND THE AZTEC. |
| CHAPTER XXI. | DISCUSSING WAYS AND MEANS. |
| CHAPTER XXII. | A DARING UNDERTAKING. |
| CHAPTER XXIII. | A FLIGHT UNDERGROUND. |
| CHAPTER XXIV. | THE SUN CHILDREN'S PERIL. |
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