It was a pity; she would have liked to look at the white-noise producing rectangle again. Twilight was fairly well attuned to the leylines, and when the knobs on the top were played with, she'd been able to pick up layers of field. It wasn't very sensitive; the short-range thaumic analyzers the hospital had were far superior, and she had a machine in her basement which put them all to shame . . . but it was small and portable, and if she'd understood Dale's explanation, it was a way to carry voice over thaumic wave. Such a concept could revolutionize the telegraph industry.