[She gestures at Harry to come join her.] It's just over the edge here. If you swing down, you'll be able to put your feet on the windowsill, and there's a stool there to help you get inside. [She'll demonstrate it herself, although she pretty much just swings right into her bedroom like a monkey, forgoing the use of the stool entirely (which she'd only used so that she could actually get up on the windowsill in the first place) and landing deftly on her feet.]