Shilk has been in charge of Federtic for nearly ten years. Even in the German Ministry of Magic, he may not be able to find a wizard who knows the habits of this straw man better than her.

"Nightmare is a way to restore its strength and is most suitable for use in crowded occasions. This behavior will not have any intuitive impact on people, but will subtly absorb people's energy, and problems will arise over time."

Professor McGonagall frowned.

"It's hidden in Hogwarts now, is there a way to find it?"

Shilk said seriously.

"This is one of its purposes. Using such means to restore one's own strength is second. What it most hopes is that we will take the initiative to find it. Only in the environment that is suitable for it can all its abilities be exerted and have the opportunity to revenge. In this way, he will definitely not hide in a place that we cannot find, or it will expose itself to let us know."

Her words made the professors in the lounge ponder.

Soon Sherlock looked up at Professor McGonagall and asked.

"The first nightmare was Harry and the other three?"

"Yes, on Friday night, Harry, Ron and Hermione had this nightmare together. At first they didn't care much, until the same problem occurred in their three dormitories the next night, and Harry and the others found me."

"Then call Harry and the others first, as a source of infection, they may have been exposed to things related to straw men."

Soon, there was a portrait in the lounge for help. Harry and his group came out of the auditorium after lunch, and were called to the lounge.

Facing a group of professors here, they were obviously nervous.

Sprout comforted them with a pleasant look. Flewy was afraid that they would not have enough lunch, so he gave them a small butter cake each.

The person in charge of asking them this time was Sherlock, and he did not show a multi-faceted harsh and serious expression, and asked them like ordinary questions and answers in class.

"Did you encounter anything strange on Friday? Or see something strange?"

Harry and the other three looked at each other, and finally Harry answered.

"When we were about to go upstairs from the corner of the stairs, we felt something was staring at us in the empty classroom next to us, but after we entered, we found nothing inside. After having a nightmare that night, we also wondered if something was wrong with the place, so we went to check it again, but still nothing was found."

Sherlock keenly felt that this clue was very important, and he asked again with emphasis.

"You're sure there's nothing in that classroom?"

Harry thought for a moment, and suddenly he thought of something and said.

"On the desk in the middle of the classroom! We found a straw, which Ron Hermione and I thought might have been blown in from outside by the wind, so we didn't care and threw it away."

The atmosphere in the common room suddenly became quiet. Not only Sherlock felt the problem, but other professors also realized that something was wrong with the straw in Harry's mouth.

"Where did you throw it?"

Harry remembers this very clearly.

"It's in the trash can in that empty classroom!"

Sherlock stood up from the chair, nodding at Professor McGonagall, and then patted Harry on the shoulder.

"I reported this to the professor in time. You did a good job Harry. If you want to hide it and rely on yourself to solve it and then tell it out two days later, the consequences of the matter will be very troublesome."

Harry was embarrassed to praise Sherlock. He always felt that such praise was actually calling him a reckless man before.

Although it's really reckless.

After learning the specific location of the classroom, Harry and the other three were put back. They had to attend classes in the afternoon, and there was nothing they could do to help with when they followed.

The only people who went to the classroom to survey were Sherlock, Hilke and McGonagall. The other professors also had classes in the afternoon. Although the students of Gryffindor did not sleep well all night last night, Hogwarts was not yet able to stop classes directly.

The classroom Harry and the others said was not difficult to find, just next to the staircase on the ground floor of the castle.

This is a magical classroom that has been abandoned for a long time. For example, there have been no students or teachers in it for decades. Even Professor McGonagall has no impression of this classroom.

They pushed the door and walked in, first checked the entire classroom. The blindfolded Shilk was the one who could see the clearest.

“It has been here and stayed for a while.”

Apart from the fact that Shilk could rely on her strange feeling and noticed that it had been here, neither Sherlock nor Professor McGonagall had any other discoveries.

But they soon found the trash can in the classroom, but there was nothing in it, the straw he threw here.

"The house elves clean the commonly used classrooms every evening. The empty classrooms are cleaned once a week. It is very likely that the classroom has been cleaned by them."

Professor McGonagall thoughtfully as he looked at the empty trash can.

They did not stop in the empty classroom and went directly to Hogwarts' kitchen, which is also the base camp for domestic elves.

The entrance to the kitchen is located in the corridor where the entrance to the Hufflepuff lounge is located. Just scratch the pears on the fruit mural hanging on the corridor wall, and a door handle will appear, and the kitchen door can be opened.

There are many domestic elves responsible for the food and hygiene of the entire Hogwarts and serving the castle. They come and go in the kitchen as big as the auditorium, and it looks like there are about a hundred people.

Seeing Professor McGonagall come in with Sherlock and Hilk, all the house elves stopped their work, and everyone timidly grabbed the rags surrounding them, and looked at them with their big eyes that were not cute at all.

A housewife came out to receive them.

"Is there anything you want us to do when you come to the kitchen? Professor McGonagall."

Professor McGonagall looked at the house elf who was just like other domestic elf and could not even tell the gender, so he easily called out his name.

"Abby, I wonder who was responsible for cleaning the classroom on the ground floor during this period?"
Chapter completed!