Even the experienced shoplifters never spotted her, never dreamed that the bland, attractive young woman, looking carefully and with absorption at jewelry or silk lingerie, or standing beside them, in apparent abstraction, as though she couldn't quite decide whether to go upstairs next for <Person>'s spring ensemble, or take a turn in the blouse department, was in fact watching their fingers, recording in her alert mind every visible detail of their physical personality, and checking it with the two hundred or more photographs of well known store thieves which hung on an open rack in <Person>'s office.