Duncan quickly adjusted his expression and mentality so as not to look like a "foreigner" with confused common sense, but his mood could no longer calm down and it continued to surge like a raging storm.

Facts have proved that when you suddenly come to a strange and unusual world, no matter how strong your adaptability is or how well you disguise yourself in the initial period, you may be confused by some ordinary "common sense" at any time by the local worldview - ordinary historical knowledge can be studied systematically, and difficult professional knowledge does not need to be taken into account in life. Only "common sense" is something that will make you exclaim "Wow" only when you encounter it head-on.

It is common sense that there are no stars in the sky of this world.

The starry sky of this world is in the deep sea, at the junction of the spiritual world and the dark deep sea. This is also common sense.

Duncan could only sigh in amazement at this second point of so-called "common sense".

He had never been exposed to this realm, nor had he ever reached this depth - he had sailed through the depths of the spirit world on the Lost Homeland, and had also seen the chaotic light flow leaking from the subspace at the bottom of the cabin of the Lost Homeland, but he had never seen the "starry sky" between the deep sea and the spirit world... This happened to be his current cognitive "blind spot".

While he was dealing with Morris's conversation, he was thinking rapidly in his mind.

The stars... hidden in the depths of the sea... what a strange and bizarre scene this would be? Is the so-called "starry sky" that Morris mentioned the same thing as the "starry sky" he knew? What is the shape of the place where the spirit world and the deep sea meet? Is it a deeper and darker ocean? Or is it just a special space structure named after the ocean?

For some reason, Duncan suddenly thought of the girl named Shirley and her inseparable pet and weapon "Agou".

Agou is a "deep hound". According to this world, it is a "demon" summoned from the depths of the abyss to the real world.

Duncan couldn't imagine what kind of physiological structure such a skeleton hound had, but judging from its appearance, it was obviously not an "aquatic creature"...so it could be boldly speculated that the so-called "deep sea" was not necessarily a "sea".

It might be an extremely vast and strange space, and...it was surrounded by the starry sky.

Duncan was sketching out a possible spatial model of the deep sea in his mind, while Morris noticed that the antique shop owner in front of him suddenly seemed absent-minded. The old man looked at Duncan curiously: "Regarding astrology, do you also dabble in it?"

"I'm just... a little interested," Duncan said with a smile. He thought to himself that after he had accepted the fact that there was no starry sky in this world, he suddenly heard the word "astrology". It was a very strange feeling. "The starry sky is hidden in such a deep place... It's not easy to explore it."

"That is of course extremely dangerous, but fortunately we can also observe the projection of the starry sky through some indirect scientific means. This should be thanked to the advancement of technology. After the appearance of the spirit world lens, the navigators of ocean-going ships have gone crazy less frequently during navigation," Morris laughed. It seemed that he had not found someone willing to discuss these issues with him for a long time, and he was in high spirits at the moment. "You know, a century ago, the profession of navigator had always been the position with the highest mortality rate on ocean-going ships... In fact, I have always wanted to collect a set of the earliest spirit world lenses, but unfortunately I really have no way to do it."

Duncan blinked. He didn't care at all about what the old man said in his last sentence. He just felt that a long-standing question in his heart was suddenly answered:

In a world without stars in the sky, how do ocean-going ships calibrate their courses?

The answer is still to rely on "stargazing" - using special scientific instruments to observe the projection of the "starry sky" reflected from the depths of the spiritual world.

Before 1800 AD, navigating a ship was a deadly job.

After all, ordinary ships don’t have “sea charts” that are updated in real time like satellite positioning like the Lost Hometown, nor do they have reliable “goat first mates”.

"You are such a learned person," Duncan finally couldn't help but sigh sincerely after discussing many issues. "Nina is lucky to have a teacher like you."

"I'm also very happy to see that she has an uncle like you," Morris nodded modestly, "Now all my doubts have disappeared. Not only are you a competent guardian, but you also have a wide range of interests and a strong thirst for knowledge. To be honest... I haven't had such a pleasant conversation with someone in a long time."

The old man sighed as he spoke: "My life is good now. It's quiet and peaceful. I don't have to deal with many trivialities in the upper city. The only problem is that most of the time it's hard to find people willing to listen to me talk about these boring things... Even the teachers who work with me often can't keep up with my thoughts. It's really rare that you can listen to me for so long."

"I'm happy to be your audience," Duncan smiled when he heard this, "I'm particularly interested in history."

"I can see that," Mr. Morris smiled comfortably. Then he looked towards the window and realized that time had passed. He stood up quickly and said, "Oh, my God, I have been here for the whole afternoon?"

"If you don't mind, it's no problem for you to stay here overnight," Duncan said casually, "You can try my cooking."

"...I should be able to catch the bus back to the Cross Street District." Morris glanced at the setting sun and declined Duncan's offer. "Thank you for your invitation, but I think I should go home. The city has been uneasy recently. If I stay out all night, my family will worry."

"That's true... I won't try to persuade you to stay," Duncan thought for a moment and stood up to see him off. "I'll call Nina down first."

Just as Morris was about to say something, Duncan turned around and called out to the second floor, "Nina! Mr. Morris is going home, come down and see him off!"

Footsteps came from the stairs. Nina, who had changed into a long dress, ran downstairs briskly. She greeted the teacher first, then took a look at the sky outside and looked at Duncan in surprise: "You two have been chatting for so long?!"

"We had a very pleasant conversation," Morris said with a smile. "Your uncle is a man of wide knowledge and is always willing to learn. We exchanged many historical questions."

Duncan kept a serious face and nodded silently.

The so-called communication was actually the old gentleman talking one-sidedly, and Duncan pretended to understand it very well while listening and fooling around. But since the old gentleman said so himself, Duncan himself certainly wouldn't say much - and to be fair, he felt that he was a qualified listener and could ask some questions at the right time to keep the conversation going. Isn't this the best communication environment for old scholars who usually have no one to listen to their talk?

Nina looked at her uncle suspiciously, then at the happy old man. She wanted to say that her uncle had a wide range of interests and was willing to learn, but she swallowed the words back. Then she suddenly became a little nervous, tugging at Duncan's sleeve and whispering, "What did you say about me?"

"It's just a little thing at school," Morris said, despite his age, he had good hearing and immediately heard the girl's whisper. "Your uncle will tell you - don't worry, I'm not complaining."

As he spoke, the old man picked up the cane that he had placed aside when he entered the door, and checked the old dagger in his arms. Then he said goodbye to the uncle and nephew and slowly walked out the door.

After seeing the old gentleman off, Duncan took a look at the sky outside, and simply hung up a closed sign and locked the door of the shop - at this time, there probably wouldn't be any more business coming in.

Moreover, he had just made a large sum of money, so his ordinary "business" seemed less important.

Nina watched Duncan busying himself over there, locking the door and tidying up the counter. She felt full of questions, but before she could open her mouth, Duncan suddenly raised his head and looked at her with a smile: "I'll take you to buy a bicycle in a few days."

"Ah?" Nina didn't react for a moment, "Why..."

"I got a bonus from the city hall before, which was enough money. And I just made a big deal. I think... we can live a little better." Duncan waved the check in his hand. "At least a bicycle can always come in handy, right?"

"Big business..." Nina finally reacted, "Ah, you really sold the dagger to Mr. Morris?"

"Sold it," Duncan nodded, "It was sold for more than 3,000 sola."

Nina: “……?!”

The girl, who had a good understanding of money, was shocked by the number and then looked at her Uncle Duncan with a strange expression.

"The teacher came to visit your home, and you talked to him for the whole afternoon, and even sold him something worth over 3,000 solas... What if this gets out?"

Duncan thought about it and said seriously: "Is our store famous?"

Nina: “Are you serious?”

Duncan spread his hands and said, "Well, if the old gentleman likes that thing, I can't just give it away for free - it's rare to have a genuine item in the store."

Nina put her hands on her hips and her cheeks puffed up, but in the end, the breath she had been holding suddenly turned into a smile.