The possible culprits were nobody she really wanted to consider. Draco was ruled out as a possibility. What would he have to gain from sitting outside watching the area surrounding his property? He'd already set up wards to tell him any time someone entered or exited. Based on the pleasurable encounters they'd been able to share more than a couple of times in the past month as she brewed the polyjuice potion, she knew that he wasn't shy about waltzing through the front door. No, if it was the owner, he wouldn't bother waiting outside.