Dusk runs out and night falls.

Richard strolled through his newly rented courtyard.

At this time, Alex had already left, saying that his legs were about to break and he needed to take a good rest, otherwise he might not be able to get out of bed tomorrow. Gro also left and returned to the academy, saying that he would get up early tomorrow to find a way to report for elective courses.

Richard was alone, walking in the empty courtyard, his footsteps echoing.

"Da Da Da ......"

Richard patrolled the courtyard, and the more he looked, the more satisfied he became.

It is a two-way courtyard with a small fountain in the front yard and a small garden in the backyard. Although it looks messy and full of weeds because no one has taken care of it for a long time, it can be restored to its original appearance with a simple cleanup, which is much better than the yard rented in Emerald City before.

As for the haunting mentioned by Alex, Richard was not at all worried.

First of all, he is not afraid of ghosts, or rather, he is not afraid of the unknown.

He was more curious about the hauntings than he was afraid. If there is a haunting, he is very much like looking into what caused it.

And even if there really are unexplained ghosts, he will find a way to catch the other party and then study it. Perhaps, it is not necessary to find any major results, and it would be better to unravel the truth of the world.

With this in mind, Richard stepped into the depths of the courtyard, carefully examined each room, and then thought about how they should be arranged.

"This room is spacious enough to be used as a main laboratory. Richard said to himself, "This is a backup laboratory." Here's a small toxic gas lab with a fume hood. This is a microbial culture laboratory, which needs to be renovated, and if possible, find a way to put on a temperature control system. This room is used as an ordinary material storage room, constant temperature and constant pressure and constant humidity, this is a dangerous goods storage room, do a good job of leakage prevention, this room ......"

Richard was talking to himself when he suddenly heard a slight knock on the door from outside the courtyard door.

"Huh?" Richard raised an eyebrow, stepped out, and opened the courtyard door.

Then I saw that the street outside the courtyard gate was empty.

A cold wind blew, rolling up the dead branches and leaves in the yard, and suddenly there was a bit more eerie atmosphere in the night.

"Hmm......" Richard pursed his lips, remembering that Alex had mentioned the ghost knocking on the door earlier, and it seemed that this was it.

"Did you come so quickly, a gift to your door? Richard said, squeaked the door shut, and walked into the courtyard, ready to see what would follow.

As a result, not long after entering the courtyard, there was another knock on the courtyard door.

"Bang bang bang!"

Quickly walked to the courtyard gate and opened the door, but it was still empty outside.

Richard's eyes narrowed slightly.

He closed the door again and waited quietly not far from the courtyard door, and then heard a third knock on the door.

An arrow stepped forward and opened the door, but it was still empty.

Richard's eyes narrowed into a slit, then returned to normal, his eyebrows moving a few times, and he had already guessed some possibilities.

"Is that so...... Richard muttered, a slightly disappointed expression, "I thought it would be a more complicated reason......

As he spoke, Richard walked out of the courtyard gate, and stood still in the night, in a corner of the street, and performed the "Concealment Technique" he had obtained from Old Mullen, allowing his breath to quickly integrate into his surroundings.

Wait, wait......

After a while, there was a faint and indiscrete sound of wings flapping in the sky, and I saw a large number of bats flying towards the courtyard gate and starting to strike.

The courtyard gate began to make a noise: "Bang bang bang!"

As Richard approached, the bat sensed something, flew away quickly, and disappeared without a trace in the blink of an eye.

Richard walked straight to the courtyard gate, sniffed violently at the wooden door, smelled a faint fishy smell, and exclaimed, "Sure enough." ”

The reason for the ghost knocking on the door has been found, and it is not worth mentioning it: the courtyard door is stained with or smeared with a special liquid that can emit a smell that attracts bats, thus attracting many bats, and hitting the door makes a sound similar to knocking.

When a person approaches the door when he hears a knock on the door, because the bat uses ultrasound to detect the surrounding environment, it is extremely keen, and it can detect it in advance and stay away from it first, so no matter how many times the person opens the door, he will not see the shadow of the bat, and it will become a ghost knocking on the door in a sense.

In fact, similar means have existed in ancient China on the modern earth for a long time. The liquid used is the blood of the yellow eel, which can attract bats within a radius of several hundred meters to achieve a certain purpose.

After figuring this out, Richard couldn't help but be a little disappointed, after all, he really wanted to catch a "ghost" to play with before...... Well, what about research.

It's just a bat now, but there's not much point in researching.

Once you've figured it out, it's easy to figure it out once and for all.

As soon as Richard flipped over his hand, he took out a bottle of lye from the spatial iron ring, opened the cork, and sprinkled it evenly against the wooden door, allowing the lye to soak in it.

Although it is not known what the substance contaminated in the wooden door is, unless the other party is extremely chemically inert and does not react with the lye, the lye can destroy the structure of the other party and make the other party ineffective. Even if the other party is really chemically inert, the smell of the lye is enough to mask its smell and prevent the bats from returning.

With that done, Richard walked through the door. After waiting patiently for a while, I found that the bat did not reappear.

Relieving of his heart, Richard began to continue to inspect the various rooms and build a blueprint for the future laboratory, which was not completely completed until the dead of night.

Although Richard knew that it would be difficult to really implement the whole blueprint under the current conditions. But Rome was not built in a day, and it can be done step by itself.

Even if you can't build it here, you can build it in the rest of the places when you have the chance.

With that in mind, Richard walked out of the courtyard and walked back towards the White Rock Tower.

Walking down the streets, Richard saw that many places were plunged into darkness, but there were also many places that were brightly lit.

As he walked past the "Salt and Fire" tavern where he had eaten lunch, Richard heard a commotion inside, and at the same time the soft sound of the piano and singing came out, and it was the woman who continued to play and sing during the day.

Because it was a ballad, Richard couldn't understand much, but he could vaguely distinguish the rhythm in the music: one strong, one weak, one strong, one weak......

"Well, is it 2/4 of the time?" Richard muttered to himself, "Well, it's changed, it's 3/4 of the time now: strong, weak, weak." ”

"Strong, weak, weak, sub-strong, weak, weak, this has become 6/8 time again?" Richard gradually moved away from the tavern and couldn't help but shake his head, "This rhythm is a bit chaotic, and sure enough, in this medieval-like world, under the premise that the metronome has not yet been invented, the music needs to be improved." But then again, if you don't ask for anything, you can still listen to it. Click, click......"

Slowly, Richard stepped into the darkness.

......