“And that’s true.” She was serious again, resuming her pacing. “Why should I choose a woman at random, kill her, and take her child? A stranger I knew nothing about! It makes sense to the police because they’re men; they believe that because I wanted a child, I wouldn’t care who or what it was.”

“Their response would be, you knew Eleanor Gray was alone and in hiding. The perfect choice. There was no one to come looking for her.”

“To learn that much about her, surely I’d have learned her name as well. I don’t know how people behave in France or Canada. In Scotland we don’t confide in strangers!”

“Perhaps you met her as someone else. Using another name.” He paused. “Mrs. Cook—”

She went so white that her knees buckled, and he sprang from his chair to catch her as she fell. Carrying her to the bed, he laid her gently on the rough surface of the blanket. “Fiona—”

Her eyelids fluttered, then shut. Her voice when she spoke trembled. “I don’t know a Mrs. Cook.”

“Yes, you do,” he said, pulling the chair closer to the bed. “You know precisely who she is. She gave birth in Lanark to the child you called Ian Hamish MacLeod. I’ve spoken to her physician, his name is Wilson. I know that she had a hard birth and a very difficult recovery. I know, too, that it will be impossible for her to bear other children.” He stopped, then added the last bit of information that sealed his certainty. “You told your aunt you were expected to work out your notice at Mrs. Davison’s. But you didn’t. You explained to her why you were being sent for—that your aunt in Duncarrick was ill—and Mrs. Davison, a compassionate woman, released you immediately. She cared enough about you to make it easier for you to leave her family. And so there was nearly a month between the time you promised to come to Duncarrick with your child and the time you arrived here. You spent that time somewhere with the boy and his mother. But you lied to your aunt, you lied to Mrs. Davison, for all I know you have lied to Mrs. Cook. But you can’t lie to me, Fiona. I know too much.”