The students had filed out, and Minerva was glad that no one had stayed behind to tell her that they wouldn't want to continue participating. No one but Finnigan, that was, and she had thought he was such an obvious choice.
When he said it was about his Patronus, Minerva's weathered face looked almost relieved for a moment, and then it passed.
"Yes, Mister Finnigan. You did say you could produce one, did you not?"