| Chap. | Page | |
| I. | Into the Primitive | 15 |
| II. | The Law of Club and Fang | 39 |
| III. | The Dominant Primordial Beast | 61 |
| IV. | Who Has Won to Mastership | 93 |
| V. | The Toil of Trace and Trail | 113 |
| VI. | For the Love of a Man | 147 |
| VII. | The Sounding of the Call | 177 |
| "Straight at the man he launched . . . his fury." | 30 |
| ". . the aurora borealis overhead..." | 78 |
| "It was to the death." | 94 |
| "John Thornton and Buck looked at each other." | 142 |
| "Behind him were ... all manner of dogs." | 158 |
| "Lying down when the moose stood still." | 198 |
| "In the summers there is one visitor . . ." | 206 |