It was hard for a man and a woman to be fiends with no under thought or glimpsed prospect of sex. They wanted to be friends. It was almost a matter of principle. She was as intelligent as any Fellow of King's - though he thought she did not know it - he was in love with her mind as it followed clues through labyrinths. Love is, among many other things, a response to energy, and Griselda's mind was precise and energetic. He wanted to make love to her too.