The Wind People — Marion Zimmer Bradley

Sometimes she had walked for days at a time in that dream; she would wake to find food that she could not remember gathering. Somehow, pervasive, the dream voices had taken over; the whispering winds had been full of voices and even hands. She had fallen ill and lain for days sick and delirious, and had heard a voice which hardly seemed to be her own, saying that if she died the wind voices would care for Robin.