"If he were here, I would know," Daneel soothes her, or tries to. "There is no one here besides ourselves. You are safe."

If he says it, it might be true; he believes her utterly that there would be someone after her. That she might be mistaken hardly crosses his mind. It would be hard for him to identify someone he's never met based upon their mind alone, but... he might be able to do it.

"He will not harm you any further, Lydia."