Harry nods, and all three of them take out small stoppered glass vials. Inside are gleaming silver granules interspersed with the brown flakes of powdered belladonna. Hermione settles on her mattress and watches with fascination as Ginny crouches down to sketch a large pentangle on the floorboards. Then the three of them unstopper the vials and cautiously pour the contents out, following the pencil lines. They’re careful not to get any of the mixture on their skin or inch a finger over the barrier.