"The locket.  The one Umbridge was wearing at Mary Cattermole’s hearing."  When I first saw you properly, she thought, but did not say aloud.  They'd first seen him in the elevator before they'd gone down to the courtrooms, of course, and Harry said he'd been on the Astronomy Tower the night Snape killed Dumbledore, but she'd been so terrified he'd somehow see through their polyjuice disguise and so off-put by his comments to Ron (as Reginald Cattermole) about his wife's blood status that she hadn't really looked at him properly until she was in the courtroom with Umbridge. When the sight of you sitting there took my breath away. 