The room was small, with only the Head Unspeakable herself there. In the center, on a marble-topped table, a round gold object rested. The witch nodded at Hermione, then drew her wand and pointed it at the device. A plate covering the front of it opened, bathing the small room in eerie green light. Hermione pointed her own wand at the device, her hand shaking. Together the two witches began to murmur the complicated spell that would send them back in time to summer 1938....