The old man summarizes and reports the results of the investigation by the <.

The members of the gathered in the dining room listen attentively.

<

"I see. That's all right. Let me hear it."

<

"Huh?"

<

According to the old man's explanation, <> used to be the boss or owner of the present <>.

To explain the position more precisely, the test base for the submarine designed at <> was <>.

Its test partner is the current <>.

<<> had no backer like <>, so they were developing and operating submarines by themselves. ...... This includes the old man's speculation.

"So there was such a power relationship. That's why Jigo......<> had a better chance of winning."

management magic brain is probably because we had the <>.

"Yes, they were in charge of the final management."

<

Then the old man explains some other information.

.

"I see. < The concentration was concentrated on the eastern coast of the former Leonard Kingdom because of the high concentration of free ether, the less severe climate, and the proximity to the sea, right?"

The old man affirmed Jin's guess and continued the conversation.

<>

"The western continent?"

"What's there?"

<

"Why underground?"

"That's right."

The group that went to <<<< the Rasheel continent overcame this problem in some way>>.

Jin agreed that if the technology was as good as that of the <>, it would be possible to take such measures,.......

<>

"Can you tell us?"

<>.

The bedrock of the Rasheel continent is rich in mithril silver and adamantite, which have a weak shielding effect against magic.

> technology.

The reason why the concentration of free ether was low here in the southern hemisphere of Arus was because free ether was sent out into space using the <>.

However, if it is only for the underground towns, not the whole continent, then only a few tens of thousands of free magical elements (ether) to be sent out into space would be enough.

It is said that there was a faction that built and lived in underground towns with such an idea .......

<<>> "No, but that is still not enough.

"No, it was still easy to understand."

Speaking of the continent of Rashear, it is connected to the four duchies that are currently under development.

Jin thought it was good to have this information when the construction of the canal was about to start.

The old man's report ended with little else.

* * * *

After the report of the old man, the members of the "Jin Family" expressed their opinions.

"Hmmm, the Rasil continent..." "Hmmm, the Rasil continent..." "Hmmm, the Rasil continent..."

"Hmmm, it's a continent we haven't explored yet, isn't it?

"I'm interested in it.

"I'm interested in it." "It seems to be full of unknown animals.

And then,

"...... but I didn't think they built the town underground.

Jin muttered.

<, we can check everywhere on Ars as much as we want, but there is a limit.

Ultimately, we need < to see, so there is no problem on the ground, in the air, or indoors, but it is a different story when we are under the ground.

As I have written before, it is not an easy task to investigate the subsurface of a vast continent, even if the coordinates are known or the area is very limited.

Even with your potential.

For example, if you < 3 meters below the surface, you will not be able to find your target just 1cm below the surface.

This is called .

To prevent this, the only way is to assume the size of the target object and scan it with an operating width of about one-third of the size of the target object.

If scanning can be done at 10 meters per second, 1 kilometer (=1000 meters) would take 100 seconds.

To scan a square kilometer of land at 10 meter intervals, 100 times that is 10,000 seconds, or That is, less than 2.8 hours.

To do the same to a depth of 100 meters is 10 times longer, or 28 hours.

If we assume that the area of the Racir continent is roughly 1.28 million square kilometers, this would take more than 4,000 years.

Therefore, the survey of the Racir continent was limited to the surface.

"If only we could identify the points to be surveyed..."

The old man said.

"I see... that's a good idea..."

< is under Marikka's control.

of , of , of , and of in the north of the Pandor continent.

Incidentally, there are no magic brains in the docks west of Pandor.

Marikka, will you check?

"Yes, Jinsha! Leave it to me!　Hanako, I'm coming!

Marikka, at Jin's request, runs out of the cafeteria with Hanako, the automata.

Marikka, who had been asked by Jin to go with the automata Hanako, ran out of the diner.

"I've been thinking about something. ......"

"What?　What is it, Jin?

"Actually... ......

<.

Of course, he wanted to hear their ideas on how to realize <>.

"Well, that sounds interesting.

"Let's think about it."

< were enthusiastic and agreed to lend their wisdom toward the realization of the new material.