A sixth-year boy Harry recognized from their shared Herbology class strode halfway up the Hufflepuff table before stopping behind Geoffrey Abernathy, a sixth year Hufflepuff prefect. The boy said something, too low for Harry to hear, and Abernathy turned around. Tom cast a subtle spell on the boy and his voice grew louder and louder, until heads started turning to look. Harry, from his seat ten feet away, could hear clearly.