PRIVATE.
He tried, but Witchers have limited magical abilities. He attempted to have another sorceress help her, but Triss was — afraid of a prophecy surrounding her. It... hurt Ciri. She learned to be afraid of her power. I don't particularly believe in prophecies. I've seen them used to murder girls born during eclipses and to murder elves and anyone with elven blood, and I've seen fair too many that don't actually come true.