The horror of it still remained with the forest people, for a thousand unmarked graves, shunned like a pestilence, and scattered from the lower waters of James Bay to the lake country of the Athabasca, gave evidence of the toll it demanded.
Now and then in their wanderings Kazan and Gray Wolf had come upon the little mounds that covered the dead.

Instinct--something that was infinitely beyond the comprehension of man--made them _feel_ the presence of death about them, perhaps smell it in the air.

Gray Wolf's wild blood and her blindness gave her an immense advantage over Kazan when it came to detecting those mysteries of the air and the earth which the eyes were not made to see.

Each day that had followed that terrible moonlit night on the Sun Rock, when the lynx had blinded her, had added to the infallibility of her two chief senses--hearing and scent.

And it was she who discovered the presence of the plague first, just as she had scented the great forest fire hours before Kazan had found it in the air.
Kazan had lured her back to a trap-line.