Hermione stopped to consider what he was asking her. How did he even know in the first place that she'd left work early to go to Cornwall? Rachel might have been able to tell him that she left early after speaking to Augustus for a few minutes, but there was no way she would've known where she went. She remembered Draco's request from the day he took her to Number Twelve for the first time. He asked that she always cloak her magic when she was going to or from the house and while she was working inside. At the time, she thought his fear that Antonin was still tracking her every move ridiculous.