| A | B |
|---|
| Buck in California | gentle, mild-mannered, lord of the land |
| Spitz and the team | strict leader |
| Curly | sweet and becomes a victim of the pack |
| John Thornton | American ideal of a man in the Yukon |
| Mercedes, Charles, Hal | they don't belong in the wilderness |
| Buck as a mail dog | learns to survive during this time |
| Buck as Thornton's friend | loyal and protective |
| Buck in the wild | primordial beast |
| Francois and Perrault | mail carriers for Canada |
| Dave | becomes sick on the trail and the Scotch half-breed puts him down |
| Billie | Hal kills him with an axe handle |
| Spitz dies | Buck fights him and the pack finishes him off |
| Hans and Pete | Thornton's partners |
| Buck's physical appearance | Half Saint Bernard and Half Shepard |
| Yeehats | The Indian tribe that killed Thornton |
| club and fang | the laws which Buck learns to adhere to |
| Naturalism | man is not part of nature but must survive within it |
| Santa Clara Valley | place where Buck originally came from |
| Manuel | works on the farm where Buck lived |
| Judge Miller | The original owner of Buck |
