07-14 Sneaking Into the Ruins
After that, they had lunch in the carriage . The butler Claude tactfully went outside to eat, and it made Jin feel a bit guilty, but no matter how Jin tried to persuade him he stubbornly didn’t listen and so that’s how things were .
The dinner was bread and fruit prepared beforehand . And then at the critical moment Jin took out his thermos flask .
“Ah, hot . Why?”
Elsa was surprised that the Teee inside the thermos flask had retained its warmth . Jin smiled and,
“That’s something called a ‘thermos flask’ . ”
He explained .
“Does it use magic?”
Elsa tilted her head and asked .
“No, it keeps the contents warm as if it used magic, but it doesn’t utilize any particular magic . Although I did add [Clean-up]’s Magi Formula to it, but that doesn’t have any connection with the heat insulation . ”
“Then, why?”
“Yeah, I’m also interested . ”
As not just Elsa but also Reinhardt was interested, Jin adjusted his sitting posture to begin explaining while drinking the Teee .
“This is also something I learned from my teacher, but there’s three ways to transmit heat . ”
He began like so . Both Reinhardt and Elsa were listening intently .
“First is conduction . It’s the transfer of temperature between objects . ”
“Uh-huh, if I put a metal spoon in hot soup, the handle will soon become hot . ”
It seemed that Reinhardt immediately digested it .
“Next is radiation . When you hold a hand out near a fire it gets warmer, right?”
After the question this time Elsa replied .
“Mm . Even from a distance, it’s warm . You say that’s radiation?”
Jin gave a nod to Elsa’s question, and started to speak of the third way .
“The third one is convection . As air or water for example warm up they become lighter and ascend, and as cold air is heavier it comes down . Convection is the repetition of this cycle the air does . ”
“I see, so when you heat up a cold room with a fire, and the ceiling is warm while the floor is cold, it’s that . ”
Reinhardt said, and Elsa also spoke of her experience .
“A bath . Without stirring it, only the top is hot while the bottom is cold . ”
Jin clapped his hands together and,
“That’s right . You two are good, huh . ”
He spoke well of them .
“So, this thermos flask, the walls of the container have a hollow structure, and the air inside has been drawn out . Having done that, there’s no way for heat to escape using convection or conduction . ”
Jin said, and Reinhardt’s face lit up,
“And so that’s why it doesn’t cool down very much! Amazing, Jin, what’s that discipline called?”
He got somewhat excited .
“It’s ‘science’ . It’s the study and attempt of explaining all the phenomena of nature . ”
Jin explained, and Elsa gave out a rare smile,
“I see now . One of the reasons Jin-kun is amazing is that he knows this science thing . That’s why all the Magi Tools Jin-kun constructs make sense . ”
She said . Jin nodded and,
“Elsa, that’s exactly right . The science I learned from my teacher, they learned from their teacher, who again learned from their teacher, and like that it is the knowledge attained after thousands of years . ”
He explained .
“Hmm, I would’ve also liked to be taught by Jin’s teacher!”
Reinhardt said, seeming frustrated . Possibly the reason Reinhardt hadn’t asked prying questions regarding Jin’s teacher was out of consideration for him .
Day turned to night .
The moon that told of was hanging right in the middle of the sky . That meant it was minutes to midnight .
“Now then, shall we go?”
Reinhardt asked in a low voice .
“Yeah . ”
Jin agreed .
Elsa was sleeping on the reclining chair . And so Reinhardt gave orders to the butler Claude .
“Claude, please stay here and watch over Elsa . Me and Jin will go to the ancient ruins . ”
“Yes, as you wish . ”
Because Reiko followed them as a guard, with Claude there were no worries . Well, and because the SP were guarding the carriage from the shadows .
Although they traveled the road during the day, during the night walking was hard . Even more so as to be safe they were walking without lighting any lamps . Nevertheless, with the guidance of Reiko to whom darkness was irrelevant Jin and Reinhardt could be at ease .
And then at last they arrived at the entrance to the ancient ruins . From inside the light of magic lamps leaked out, likely because the lamps had been left on .
“Reiko, please somehow check that there’s no people inside . ”
“Yes . ”
According to Jin’s instructions, Reiko disappeared using [Stealth] and approached the entrance of the ancient ruins like wind, peeked inside, and returned without making a sound .
Although there was no way Jin or Reinhardt saw this .
“It’s fine, there is no one . ”
The two were relieved by the report and again set foot inside the ancient ruins .
“Now then, Jin, where should we start? You’re probably well-informed so I’ll follow your instructions . ”
Reinhardt said . Jin lived in a mansion that had a Warp Gate, even though it was small, and for that reason Reinhardt must’ve referred to Jin’s judgment .
After thinking for a bit Jin replied .
“It must be underground . If it’s an important storehouse, surely you’ll build it underground . And I dare say there’s no doubt it’s hidden using concealment magic . ”
Reinhardt agreed with that reply, saying,
“That’s most likely the case . But, concealment magic? That’s troublesome . ”
But Jin shook his head in denial .
“That only prevents searching through magical means . ”
“Eh?”
“If there’s a cave on the other side of the wall, the sound it makes when you hit it is different, right?”
“Mh-hm . ”
“So basically, let’s use [Sonar] . ”
Jin explained and Reinhardt gave a pat on Jin’s shoulder in praise .
“I see! I didn’t tnotice that! Let’s try it right now!”
And so Jin and Reinhardt both went to using [Sonar] magic to search the floors and walls .
“Not here…”
When Jin was about to start on the next wall, Reinhardt yelled .
“Jin! Come see this!”
“What’s up, did you find it?”
Jin ran in a hurry to where Reinhardt was .
“Uh-huh . Behind this . ”
Then Jin alslo tried investigating using [Sonar], and indeed he noticed that on the other side of that wall there was a large cave .
“Having done that, next is how to get to the other side . ”
They could use earth magic to dig a hole, but thinking about the future leaving traces behind would be kind of bad .
Eventually, they decided to dig a different hole from outside .
They went outside temporarily . Reiko who had been standing guard accompanied them to a place around fifty meters away .
“Alright, let’s dig around here I guess . ”
As there was a protrusion of rock making it hard to see it from outside, they chose that place and finally work began .
“[Dig] . ”
Jin dug the hole,
“[Hardening] . ”
And Reinhardt strengthened the walls to prevent a collapse .
Reiko went out to throw the resulting debris far away .
Like that, after approximately an hour, finally the hole pierced through .
“We did it!”
A large room spread out beyond the hole .
Jin and Reinhardt carefully stepped inside .
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