Maternus Interruptus

Hermione stood outside the potions classroom fidgeting. She replayed in her head again what she needed to say to the Potions Master. "I can hear you out there. If you need to see me, Miss Granger, just come in." Truthfully, he was expecting her. The mediwitch had told him an eighth year student was requesting a certain potion and had been directed to seek it from him.