He nodded his head enthusiastically. "Quite so!" He looked at the clock on the wall. "Oh my! Breakfast is being served." He finished his tea and continued, "Ms. Granger. I would fully explore this  in secret  . Oh and  try  not to use it for pranks, please." there was a wink as he said it, giving me an illusion that it might be allowed in certain circumstances. My thoughts went straight to Umbridge. As we were about to leave his office, he added, "oh! Have you started to work on a cure for Ms. Edgecombe?"