The next day, Felix came to the corridor where the attack took place last night, and it was no surprise that he met Filch.

The corridor had obviously been cleaned by him, and the puddles on the ground had disappeared. On the wall where the words "The Chamber of Secrets has been opened" were written, there was an empty chair.

At this moment, he was facing away from Felix, and was laboriously scrubbing the words on the wall with detergent, but it seemed to be in vain.

"Mr. Filch."

Filch turned his head, his eyeballs bulging, his face was abnormally flushed, and he was still mumbling, but when he saw Felix, he still greeted politely: "Professor Hepp."

"I'll take a look at the scene, maybe I can find some clues left behind."

Felix didn't deal with Filch much when he was in school. At that time, he didn't have Mrs. Norris as a helper, and he was completely immune to his threats with his excellent Disillusionment Charm.

Filch gave up his seat and stood aside a little at a loss. He had just revealed his identity as a Squib yesterday, and today facing this genius professor, he didn't want to stay for a second longer.

"Well, then I'll leave first, Professor, I have something else to do..."

"You go ahead," Felix replied, "Oh, right." He waved his wand, and the writing on the wall suddenly faded.

"Huh?"

He was a little surprised, and quickly approached the wall and looked up and down at the writing. "It seems to be a compulsory magic, but it's not a permanent sticking spell." Felix pointed at the wall with his wand, and soon, the writing disappeared.

"Thank you, thank you." Filch blushed, said hurriedly, and left quickly without even taking the cleaning tools.

Felix began to search around, and soon, he found a clue.

He squatted on the ground, tapped the ring on his left hand with his wand, and a large magnifying glass appeared in his hand.

Felix carefully observed the ground, where there was a burn mark.

"What is this? How did it appear?"

Felix raised his head and looked at the girls' bathroom opposite. Without thinking too much, he quickly pushed open the copper handle and walked in.

This is a rather dark and damp place, with stains on the walls, stagnant water on the ground, and the tiles on a row of sinks peeling off. The only light source is a few dark candles.

Felix suppressed his discomfort and kept looking around.

A voice suddenly came from the innermost single room, "Who's there?" Then, a gloomy ghost rushed out, and pearl-colored glasses covered most of her face.

She looked at Felix and obviously recognized the professor.

The ghost was stunned and looked behind him in disbelief. Yes, this is her own chassis, the girls' bathroom...

"Professor?" "Hello

, Myrtle." Felix's voice was quite calm. He came to investigate the case, and he had a legitimate excuse. Well, that's it.

Myrtle stared at him blankly for a few seconds, and suddenly screamed. The whole ghost flew back to the toilet, and he could even hear a crisp splash of water.

Felix: "..." Is it that serious? I just want to ask you a question, and I'm trying not to be embarrassed.

Felix said, "Myrtle, I know you are here. Did you see the attack yesterday..."

"No! Nothing!" Myrtle shouted in the cubicle.

Then, he heard footsteps not far away, and was startled. He quickly cast an Invisibility Charm on himself, quickly left the bathroom, and passed by a red-haired girl.

Being discovered by a ghost is not terrible, but if he is caught by students...

his reputation will be ruined.

In the next few days, he cooperated with several professors to search the entire castle when he had no classes, but naturally found nothing.

One day in the auditorium, Felix was still thinking about this while having lunch.

"Everything started with the Dark Lord's Horcrux, but it seems useless to know this... I don't know who the heir is, where the Chamber of Secrets is, and where the Horcruxes are hidden."

"Chamber of Secrets, Slytherin, heir, petrification... these are obviously the key words. But how to connect them?"

Felix always felt that he was very close to the truth, but there was a layer of fog between them.

"Slytherin...snake?"

He tried to recall, trying to uncover the long-forgotten memory. He seemed to see something, "Harry" fighting a giant snake. But the memory was quite vague, he was not sure if he remembered it wrong, he seemed to have solved a large group of Dementors by himself.

How is this possible? Ordinary adult wizards can't do it!

Moreover, how could Dementors attack the school?

But Felix quickly reminded himself that in the magical world, everything is possible. Especially with the existence of the "protagonist".

"So, it is very likely that it is true that a giant snake caused Mrs. Norris to be petrified." Felix deduced from this conjecture.

But he encountered a problem again.

What snake has the power of petrification?

Felix could only think of Medusa, but this magical creature has become extinct.

"It is not ruled out that Slytherin has carried out blood grafting... From his remaining notes, he has studied magical blood very deeply."

He didn't figure it out until he finished lunch. But he soon had a new idea. He collected the rumors about the Chamber of Secrets in Hogwarts over the years and identified them one by one.

Maybe the truth is hidden in the rumors.

...

Three days later, Felix stood opposite a tapestry of "The Troll Beats Barnabas" on the eighth floor of the castle, looking at a silver door slowly appearing with a strange look.

Here, found it?

After a slight hesitation, he gently tapped his chest with his wand, and a flash of light flashed on his wrists, ankles, and chest, and then he stepped in.

This is an oversized garbage storage room, with all kinds of discarded items piled up in a mountain, broken feather pens, old books, damaged peepholes... He also saw the Golden Snitch with half of its wings missing. He

walked around carefully and found no clues.

"A hidden room?" He really couldn't imagine that the proud Slytherin would put the Chamber of Secrets here.

"However, this room is quite hidden. Its magic must be very interesting. Let's study it some other day." Felix walked out of the room and looked at it reluctantly. The silver door had quietly disappeared.

On the other side,

the trio was also working hard to study the secrets of the Chamber of Secrets. The "hard work" here mainly refers to Hermione Granger.

After a few days of reading materials without results and the rental list of "Hogwarts, A History of the School" was also arranged for two weeks, the Gryffindor witch finally raised her hand to ask questions in the History of Magic class, benefiting everyone and obtaining valuable information about the Chamber of Secrets.

Poor Professor Binns had to break away from the course schedule and talk about "myths and legends" under the eager gaze of everyone, which made him very annoyed. After this episode, his originally slow and dry voice sped up - this made his course more hypnotic than before.

The originally energetic little wizards fell down again, and their faces quickly became dazed and demented.