Her hair tumbled loose and bright about her shoulders; she wore the tawny hide which Kate had seen before, and on her feet, since the sharp rocks had long before worn out her boots, she had daintily fashioned moccasins.

Bare knees, profusely scratched, bare arms rapidly browning to the color of the fur she wore, Haines and Buck had to rub their eyes and look again before they could recognize her.
They must have made a noise--perhaps merely an intaking of breath inaudible even to themselves but clear to the ears of Joan.

She was on her feet, with bright, wild eyes glancing here and there.

There was no suggestion of childishness in her, but a certain willingness to flee from a great danger or attack a weaker force.

She stood alert, rather than frightened, with her head back as if she scented the wind to learn what approached.