| | PAGE |
| [I—THE BOOK OF EARTH] |
| I. | The Grand Canyon | [1] |
| II. | Night and the Abyss | [11] |
| III. | The Wings | [22] |
| [II—THE GREEKS] |
| I. PYTHAGORAS |
| I. | The Golden Brotherhood | [29] |
| II. | Death in the Temple | [37] |
| II. ARISTOTLE |
| I. | Youth and the Sea | [50] |
| II. | The Exile | [60] |
| [III—MOVING EASTWARD] |
| I. | Farabi and Avicenna | [77] |
| II. | Avicenna’s Dream | [85] |
| [IV—THE TORCH IN ITALY] |
| LEONARDO DA VINCI |
| I. | Hills and the Sea | [95] |
| II. | At Florence | [110] |
| [V—IN FRANCE] |
| JEAN GUETTARD |
| I. | The Rock of the Good Virgin | [125] |
| II. | Malesherbes and the Black Milestones | [137] |
| III. | The Shadow of Pascal | [146] |
| IV. | At Paris | [154] |
| V. | The Return | [164] |
| [VI—IN SWEDEN] |
| Linnæus | [169] |
| [VII—LAMARCK AND THE REVOLUTION] |
| I. | Lamarck and Buffon | [187] |
| II. | Lamarck, Lavoisier, and Ninety-three | [195] |
| III. | An English Interlude: Erasmus Darwin | [202] |
| IV. | Lamarck and Cuvier: the Vera Causa | [209] |
| [VIII—IN GERMANY] |
| GOETHE |
| I. | The Discoverer | [215] |
| II. | The Prophet | [226] |
| [IX—IN ENGLAND] |
| DARWIN |
| I. | Chance and Design | [231] |
| II. | The Voyage | [242] |
| III. | The Testimony of the Rocks | [249] |
| IV. | The Protagonists | [273] |
| V. | The Vera Causa | [311] |
| [X—EPILOGUE] |
| Epilogue | [325] |