Hermione nodded, storing away the information to look into later. "Thank you."
When he started explaining the missing parts of the potion Hermione realized just how close they'd gotten. She blushed hard, finding him looking over her shoulder like that mildly distracting. Not unpleasant, just distracting. "So," she pulled herself back into study mode, "even if I had worked out everything the way I was going an antidote wouldn't have worked. Or it might have killed him!" She turned her head to look at Jack.