Now and then one of these higher movements of air would sweep gently downward and flow through the valley for a few moments in a great noiseless breath that barely stirred the tops of the balsams and spruce.
One of these mountain-breaths came as Thor faced the east.

And with it, faint and terrible, came the _man-smell_! Thor roused himself with a sudden growl from the lethargy into which he had momentarily allowed himself to sink.

His relaxed muscles hardened.

He raised his head and sniffed the wind.
Muskwa ceased his futile fight with the bit of hide and also sniffed the air.

It was warm with the man-scent, for Langdon and Bruce were running and sweating, and the odour of man-sweat drifts heavy and far.