I've been flying when I could for three days now."  Bork, of course, hadn't known of her spell with which she'd forced herself to want him "well and truly." Apparently it had gone on operating even when she thought he was dead, and with a built-in sense of his direction.
She had no idea that her spell had been operating all this time.
mnli hypothesis: She had no idea that her spell had been operating all this time. premise: I've been flying when I could for three days now."  Bork, of course, hadn't known of her spell with which she'd forced herself to want him "well and truly." Apparently it had gone on operating even when she thought he was dead, and with a built-in sense of his direction.