The Sarsen Witch

From the back cover of the Ace first edition: They found her on the high downs, hidden under a hill. A young one with an old one's look. Naeri had been separated from her people when the horse-lords crossed the narrow sea and drove the light-boned witch folk into the hills. Now, she was a slave to the horse-lords. But the earth watches over her own. So when it was time for her to hear the singing of the stone, Naeri found a teacher. When it was time to hear the singing of the heart, she found a man to love. And when it was time to awaken the old powers, it was Naeri who called the witch folk down from the hills, clothed in war-fogs, to raise again the Standing Stones... and bind forever the faceless gods of chaos.