new mode of life. All his
days, no matter what the odds, he had never run from a fight. But
the club of the man in the red sweater had beaten into him a more
fundamental and primitive code. Civilized, he could have died for a
moral consideration, say the defence of Judge Miller's riding-whip; but
the completeness of his decivilization was now evidenced by his ability
to flee from the defence of a moral consideration and so save his
hide. He did not steal for joy of it, but because of the clamor of his
stomach. He did not rob openly, but stole secretly and cunningly, out of
respect for club and fang. In short, the things he did were done because
it was easier to do them than not to do them.

His development (or retrogression) was rapid. His muscles became hard as
iron, and he grew callous to all ordinary pain. He achieved an internal
as well as external economy. He could eat anything, no matter how
loathsome or indigestible; and, once eaten, the juices of his stomach
extracted the last least particle of nutriment; and his blood carried it
to the farthest reaches of his body, building it into the toughest and
stoutest of tissues. Sight and scent became remarkably keen, while his
hearing developed such acuteness that in his sleep he heard the faintest
sound and knew whether it heralded peace or peril. He learned to bite
the ice out with his teeth when it collected between his toes; and when
he was thirsty and there was a thick scum of ice over the water hole, he
would break it by rearing and striking it with stiff fore legs. His most
conspicuous trait was an ability to scent the wind and forecast it a
night in advance. No matter how breathless the air when he dug his
nest by tree or bank, the wind that later blew inevitably found him to
leeward, sheltered and snug.

And not only did he learn by experience, but instincts long dead became
alive again. The domesticated generations fell from him. In vague ways
he remembered back to the youth of the breed, to the time the wild dogs
ranged in packs through the primeval forest and killed their meat as
they ran it down. It was no task for him to learn to fight with cut
and slash and the quick wolf snap. In this manner had fought forgotten
ancestors. They quickened the old life within him, and the old tricks
which they had stamped into the heredity of the breed were his tricks.
They came to him without effort or discovery, as though they had been
his always. And when, on the still