he was loath to leave it when François distributed the fish which he had first thawed over the fire. But when Buck finished his ration and returned, he found his nest occupied. A warning snarl told him that the trespasser was Spitz. Till now Buck had avoided trouble with his enemy, but this was too much. The beast in him roared. He sprang upon Spitz with a fury which surprised them both, and Spitz particularly, for his whole experience with Buck had gone to teach him that his rival was an unusually timid dog, who managed to hold his own only because of his great weight and size.
François was surprised, too, when they shot out in a tangle from the disrupted nest and he divined the cause of the trouble. "A-a-ah!" he cried to Buck. "Gif it to heem, by Gar! Gif it to heem, the dirty t'eef!"
Spitz was equally willing. He was crying with sheer rage and eagerness as he circled back and forth for a chance to spring in. Buck was no less eager, and no less cautious, as he likewise circled back and forth for the advantage. But it was then that the unex-
