| A | B |
|---|
| Buck | stolen from his CA home/sold/transported to Alaskan frontier to be a work dog |
| Judge Miller | Buck's owner in CA |
| Manuel | Judge Miller's gardener/steals Buck to pay off gambling debts |
| Man in red sweater | member of dog-stealing ring/teaches Buck "law of the club" |
| Perrault & Francois | French-Canadians/Buck's 1st masters |
| Scotchman | Buck's 2nd master-delivers mail to gold seekers in the North |
| Charles | One of Buck's foolosh & inexperienced American masters |
| Mercedes | Charles' wife; another of Buck's American masters |
| Hal | Mercedes' brother; a headstrong cruel man |
| John Thornton | rescues Buck from Americans & teaches Buck true love |
| Hans & Pete | John Thornton's helpers |
| Matthewson | man who bets that Buck can't pull a 1000 lb. load |
| Jim O'Brien | man who lends Thornton $1000 to bet on Buck |
| Yeehats | fierce Indian tribe who murder Thornton & his partners |
| Spitz | Buck's archenemy/fellow sled dog |
| Curly | friendly dog/accompanies Buck on the voyage of the Narwhal |
| Dave, Billee, Joe, Sol-leks, Pike & Dub | other dogs on the sled |
