Zhang Hao took a few friends to check the three crime scenes one by one.

"Harry, the first time you heard a strange sound was here, right?" Zhang Hao led them to a corridor leading to the underground classroom—the same corridor where Harry chased the mysterious voice when Professor Nick died.

"No!" Ron reminded, "The first time Harry heard that strange sound was before that. He helped Lockhart write autographed replies and that was our punishment. Oh, you don't know, I didn't use magic at the time, I just rubbed hundreds of trophies with my bare hands! That kind of punishment was so cruel that I didn't want to experience it again. ”

"This kid, I'm off topic when he talks about it!" Zhang Hao complained in his heart, and then asked, "Harry, is that so?"

He remembered that he hadn't heard of it, after all, he wasn't a Gryffindor, and he couldn't keep an eye on Harry all the time.

But when he was here that day, Harry said, 'That voice came again.'"

This means that he did hear the voice of the basilisk before that, and that he also told Ron.

"That's right. He recalled: "It was a very soft voice, like an illusion. I've only told Ron. ”

"Why didn't I think you heard a Parseltongue?" Ron laughed to himself, "If I knew you could be a Parseltongue, I might have saved you from suspicion." ”

"Don't be stupid!" Harry shook his head, "I can't speak that language to snakes, how can you know." ”

Ron was speechless, and the hallway fell silent.

Zhang Hao touched the feathers of the piano and asked, "Where did the sound you heard come from at that time?"

To guard against the basilisk, he took the phoenix with him.

The phoenix is a more advanced magical creature than the basilisk, and it may be of great use at a critical moment.

"In the wall at first," Harry pointed to a wall, then slowly looked up as if replaying the day's footage.

Then the voice started moving upwards, very fast. He explained: "I couldn't hear well and started running after the voice. You all know later, let's chase to the women's toilet on the second floor, and we saw Mrs. Loris, who was petrified. ”

Zhang Hao nodded, then pointed to the wall and said, "It's still far from the second floor, and there are no stairs." You say, how did the basilisk get from here to the second floor?"

"It's a pipe!" exclaimed Hermione, "The basilisk moves through the pipe, there's a pipe in this wall! ”

They searched around for a while, and finally stopped in the hallway where Justin had an accident.

There are no pipe outlets, and there is not even a gap between the walls, the ceiling, or the floor.

Obviously, if there is a pipe outlet connecting to the scene of the crime, it must be very secretive.

"Where the hell did the basilisk come from?" said Harry anxiously, "even if it hides in the wall, it has to come out to hurt people, right?

Zhang Hao didn't speak, he was still observing carefully.

Suddenly, he noticed a circular relief near the ceiling.

Such reliefs are common in castles, they are the size of wheels, and they are carved either lions or snakes, eagles and badgers.

The castle is full of such circular reliefs, so no one will pay special attention to them.

But now, Zhang Hao thinks of the pipe to look at the relief, but the more he looks at it, the more he feels that it looks like a manhole cover.

"Harry, you speak snake language to the relief carved with snakes. He said in a deep voice, "Command it to open in snake language." ”

Everyone said in unison: "Those reliefs carved with snakes may be the exit of the pipeline?"

"This is just speculation, and it hasn't been verified yet!" Zhang Hao said helplessly: "Harry, try it!"

Then all eyes turned to Harry again.

"I'll try, but don't get your hopes up. He hesitated: "I've never tried to speak in front of a relief." ”

Things really didn't go so well, he held back for a long time, but he didn't even say a word.

"I'm sorry!" he said embarrassedly, "maybe I can only speak snake language to a snake." ”

Well, it's not incomprehensible.

Zhang Hao didn't say much, and directly cast a spell to conjure a snake.

"Oolong out of the hole!"

It was the dark magic that Draco used on the day of the duel.

The black snake approached Harry, and Zhang Hao hurriedly said to him, "Try it! Say 'open', you have to believe that you can succeed." ”

He also pulled out his tape recorder, intending to transcribe Harry's snake words - maybe when?

Harry looked nervously at the black snake, and gradually, he felt that all the outside influences around him were fading, as if he were the only ones in the world.

"Hisss hiss!"

He, at last, spoke another language.

Snake: "Hiss and tears the silk!"

Zhang Hao guessed that the snake must not have understood what Harry was saying, because its expression looked 'confused'.

The relief near the ceiling did not react, and everyone suspected that the plan had failed!

But...... Not far away, there seemed to be the sound of rocks rubbing.

Zhang Hao listened intently, turned on the light with his wand, and looked over there.

"Shhh

The friends gasped as they stared at the ceiling, where there was a black hole the size of a wheel.

"There's a pipe exit here!"

They were excited, as if the truth was not far off!

"The pipe exits are indeed among these reliefs, and there may be many more such exits in the castle. Zhang Hao put on his ink crystal glasses and looked at the hole cautiously.

You have to be careful at this time, if you look at a pair of big yellow eyes, then the fun will be great.

"Hao! Your guess is right. Hermione glanced at the other reliefs and muttered, "Not every relief is a pipe exit, we just stood in the wrong position." Thankfully, Harry's voice could be heard here, otherwise the door might not have been heard. ”

Others agreed, and they took out their sunglasses and put them on – they were all regular sunglasses.

Zhang Hao has a lot of these daily necessities in his pocket, ordinary sunglasses are not as good as Mojing glasses, but they are enough to save his life when facing the basilisk.

A group of little wizards with sunglasses, this picture ......

"It's so dark!" Ron said uncomfortably, "Now that we've found the entrance to the secret room, why don't we go in and catch the basilisk out?"

"Don't be stupid!" Hermione reprimanded, "Do you think any of us can deal with the basilisk? It's one of the most dangerous magical creatures, and an adult wizard can be killed." We can't be too arrogant, we have to report this to the professor. ”

"Will the professor believe us?" Harry whispered, "If the professor doesn't believe us, we'll have to figure it out ourselves." ”

Draco said timidly, "It's better to tell the professor about this, if the basilisk is really big, it can bite us to death even if it can't stare at us!"

Daphne still didn't care about anything, she pretended to be very scared, hugged Zhang Hao's arm, and leaned towards him one by one.

"Don't be afraid, Daphne! the basilisk isn't that easy, we're safe now. Zhang Hao comforted Daphne and said cautiously: "Let's tell the professor our guess first! I think they should be able to handle it." ”