. 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.

Francois 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 unexpected happened, the thing
which projected their struggle for supremacy far into the future, past
many a weary mile of trail and toil.

An oath from Perrault, the resounding impact of a club upon a bony
frame, and a shrill yelp of pain, heralded the breaking forth of
pandemonium. The camp was suddenly discovered to be alive with skulking
furry forms,--starving huskies, four or five score of them, who had
scented the camp from some Indian village. They had crept in while Buck
and Spitz were fighting, and when the two men sprang among them with
stout clubs they showed their teeth and fought back. They were crazed
by the smell of the food. Perrault found one with head buried in the
grub-box. His club landed heavily on the gaunt ribs, and the grub-box
was capsized on the ground. On the instant a score of the famished
brutes were scrambling for the bread and bacon. The clubs fell upon them
unheeded. They yelped and howled under the rain of blows, but struggled
none the less madly till the last crumb had been devoured.

In the meantime the astonished team-dogs had burst out of their nests
only to be set upon by the fierce invaders. Never had Buck seen such
dogs. It seemed as though their bones would burst through their skins.
They were mere skeletons, draped loosely in draggled hides, with blazing
eyes and slavered fangs. But the hunger-madness made them terrifying,
irresistible. There was no opposing them. The team-dogs were swept back
against the cliff at the first onset. Buck was beset by three huskies,
and in a trice his head and shoulders were ripped