Everyone spent ages talking over one another at the scene, but they could learn nothing just by looking.
As the dead ghost's remains faded completely from the mortal world, the professors discussed patrols and defenses, then had no choice but to send everyone away.
Professor McGonagall and Professor Flitwick escorted Li Wei, Hermione, Harry, and Ron back to their common rooms.
The moment Li Wei entered the Ravenclaw Common Room, the students who had been talking among themselves crowded around him, all asking what had happened.
After giving them a brief account, Li Wei took the opportunity to say:
"From what I can tell, something like last term's incident has happened at school again!"
"We just don't know what launched the attack yet!"
"Make sure you travel in groups. Don't go anywhere alone, and don't blindly trust anything strange. I mean talking alchemical objects, unfamiliar magical creatures that can communicate, or bizarre beings that can control your thoughts..."
"Such things are often steeped in terrifying Dark Magic. One careless moment, and they could take your body or drain your life!"
Li Wei spoke in a stern, warning tone.
Tom Riddle's Diary was most likely in a Gryffindor student's hands, but a student from another House might have brought it into the school.
Afterward, he had asked Ron for the details of the clash between Lucius Malfoy and Ron's father, Arthur Weasley.
According to Ron, Flourish and Blotts had been hosting a book signing for Lockhart, and the place was packed with Hogwarts students and passersby.
Li Wei needed only to picture the scene to know there was no way to guess who had actually brought the Diary in.
If Lucius had been a little more cautious and, instead of settling a score by slipping the Diary to a member of