2755 - - 73-21 The more we investigate, the deeper the mystery becomes.



Read at https://w w w . m t l r e a d e r.com




  and headed for the tunnel, but soon ran into an obstacle. It was a cave-in.


Read at https://w w w . m t l r e a d e r.com


Something is wrong. This area is supposed to be a well-reinforced section.

Yes, it is. That means it must have been artificially collapsed.

Should we try to get to the other side somehow?

Read at https://w w w . m t l r e a d e r.com


I think that's a good idea.



 So
and remove the collapsed rocks.

Read at https://w w w . m t l r e a d e r.com


 As expected, the tunnel itself was strong enough that it did not collapse as soon as the rocks were removed, and after 20 minutes, a hole was made in the tunnel that was strong enough to pass through.



Okay, let's go.

Read at https://w w w . m t l r e a d e r.com


Let's go.



 The two bodies then proceeded to the end of the tunnel.

Read at https://w w w . m t l r e a d e r.com




[...... hydrogen sulfide]

Mm-hmm.

Read at https://w w w . m t l r e a d e r.com




 The smell of hydrogen sulfide wafts from the depths of the tunnel. It seems to be quite concentrated.

 The two bodies wonder if this might also be a legacy of this .

Read at https://w w w . m t l r e a d e r.com




* * * *


Read at https://w w w . m t l r e a d e r.com


<...... and that's why, Master (my lord)>>

"I see, so that's how it goes."


Read at https://w w w . m t l r e a d e r.com


 In the cafeteria of the laboratory in Horai Island, the old man was reporting to Jin and the others about the results of the investigation of <
> and <>.

 Presently present in the cafeteria are Jin, Erza, Hanna, Saki, Goose, Marikka, <> Turles, Neige, Rouge, and others.


Read at https://w w w . m t l r e a d e r.com


"If we could monitor the vision and hearing of those <
> and <>, we could get more information in real time."

"Brother Jin, you should have told us that when we decided which golem to dispatch."

"Erza-chan is right, Onii-chan."

Read at https://w w w . m t l r e a d e r.com




 Jin blurted out, but Erza and Hannah caught him in the act.


Read at https://w w w . m t l r e a d e r.com


<<"Well, we can't hear them, but we can follow them with our peepers.

"Oh, that's a good idea. I'd appreciate it."


Read at https://w w w . m t l r e a d e r.com


 If this were a human, we would be able to know what they are talking about with <>, but against a golem, it would be useless.

 Therefore, we are forced to stare at a silent screen, just like in a silent movie.

 However, the old man, who has assessed the situation, explains the situation as appropriate, which is a great help to us.

Read at https://w w w . m t l r e a d e r.com





"Yes. Is there hydrogen sulfide ahead?"

Read at https://w w w . m t l r e a d e r.com




 This information is obtained from < through Jin D. and Marikka D.


Read at https://w w w . m t l r e a d e r.com


"Kuhu, you said that <> is specialized in production, right? If so, what can we extract from the mine?"

"Metals and magical crystals for sure."

"Yes, just as Jin predicted. The problem is the rare ores.

Read at https://w w w . m t l r e a d e r.com




 Saki was hoping that rare minerals would be produced.

 However, his expectations were betrayed in many ways.

Read at https://w w w . m t l r e a d e r.com




* * * * * * * * * * *


Read at https://w w w . m t l r e a d e r.com


 The tunnel is heading steeply into the ground. The concentration of hydrogen sulfide is increasing.



There is no sign of destruction in this area.

Read at https://w w w . m t l r e a d e r.com


Hmm. But we can never be too careful.

I know.


Read at https://w w w . m t l r e a d e r.com


The reinforcement of the ...... tunnels has begun to corrode, albeit slightly.

Hydrogen sulfide.


Read at https://w w w . m t l r e a d e r.com


 Hydrogen sulfide corrodes silver, copper, and many other metals. This is mainly due to the action of sulfur.

 It is a combustible gas and produces sulfurous acid gas when it burns. It is also toxic.


Read at https://w w w . m t l r e a d e r.com


But I don't understand. If the purpose is to corrode, there must be something more powerful.

That's for sure. We'll have to investigate that as well. ......?


Read at https://w w w . m t l r e a d e r.com


 We have reached a fork in the tunnel.

 It is a small, wide hall-like space where the tunnel divides into five different directions, except for the one we came from.


Read at https://w w w . m t l r e a d e r.com


What should we do?

There is no sign of the enemy at the moment. Then it doesn't matter which way you choose.

Then we should go first to the right.

Read at https://w w w . m t l r e a d e r.com


That's fine.



 After a brief exchange of words, <
> and <> entered the tunnel on the right.

Read at https://w w w . m t l r e a d e r.com


 The tunnel was nearly horizontal, and the smell of hydrogen sulfide had diminished.

 The tunnel seemed to yield quartz and quartz-like minerals.


Read at https://w w w . m t l r e a d e r.com





Hmm, a tunnel of magical crystals.

Yes, it seems so.

Read at https://w w w . m t l r e a d e r.com





 The tunnel dead-ends after about 500 meters.

 It looks as if there is nothing wrong with the tunnel, but in fact the situation is quite extraordinary.

Read at https://w w w . m t l r e a d e r.com





There is not a single miner golem. That's not right.

I agree.

Read at https://w w w . m t l r e a d e r.com





 From the looks of it, the deposit is excellent, and it still seems to be able to mine magi crystals, but there is no miner golem.

 Once again, the mystery has increased.

Read at https://w w w . m t l r e a d e r.com





 
and return the way they came to the tunnel branch and step into the tunnel to the left this time.

 This tunnel, too, is nearly horizontal and was dug in the same vein of magecrystal as the previous one.

Read at https://w w w . m t l r e a d e r.com



 And here, too, the situation was unusual in that there was not a single miner golem.



 They turned around twice and this time chose the middle tunnel out of five.

Read at https://w w w . m t l r e a d e r.com



 It was a gradual descent.



The tunnel was a gentle descent. And the smell of hydrogen sulfide is getting stronger.

Read at https://w w w . m t l r e a d e r.com





 Pyrite is a bright gold mineral that crystallizes in cubes.

 The golden dice specimens are well-known.

Read at https://w w w . m t l r e a d e r.com



 Its composition is sulfur and iron, with the chemical formula FeS2.

 Its main use is in the manufacture of sulfuric acid.

 It is rarely used as a steel material because the sulfur it contains adversely affects the properties of iron.

Read at https://w w w . m t l r e a d e r.com





 However, sulfide minerals are produced as ores of various metals other than iron.

Read at https://w w w . m t l r e a d e r.com



Is this ...... a mercury deposit?

It would seem so.

Read at https://w w w . m t l r e a d e r.com



 Mercury sulfide is a red mineral called cinnabar.

 In ancient times, it was called Niu, a red and vermilion pigment.

 It is assumed that the name Niu means the place where Ni is produced, i.e., where cinnabar mines were located.

Read at https://w w w . m t l r e a d e r.com





 A word of caution.

 Mercury is the only liquid metal at room temperature.

Read at https://w w w . m t l r e a d e r.com



 Mercury is toxic and is believed to cause brain and liver damage.



Could it be that they wanted mercury to disperse as a poison?

Read at https://w w w . m t l r e a d e r.com



That's possible, but the tunnels are too quiet.

Mm. ...... indeed.

Read at https://w w w . m t l r e a d e r.com



 And this tunnel, too, was devoid of a single miner golem.



* * * *

Read at https://w w w . m t l r e a d e r.com





Now here.

Read at https://w w w . m t l r e a d e r.com



 The fourth time we went to investigate.

 This time, we surveyed the fourth tunnel from the right, i.e., the second tunnel from the left.

Read at https://w w w . m t l r e a d e r.com



 The tunnel extends underground at a steep angle.



There is no miner golem here either.

Read at https://w w w . m t l r e a d e r.com



Hmm.



 What happened to the miner golem is also a mystery.

Read at https://w w w . m t l r e a d e r.com



 At the moment, the number of mysteries increases with each investigation.

 Even so,
and cannot stop their investigations.

Read at https://w w w . m t l r e a d e r.com



...... seems to be a deposit of silver mithril here.

Mm-hmm. There is also a small amount of gold.

Read at https://w w w . m t l r e a d e r.com



 
and <> go on ahead.

 And no miner golems here either.

Read at https://w w w . m t l r e a d e r.com



I have no idea.

I agree.

Read at https://w w w . m t l r e a d e r.com



 
and head for their fifth exploration, to the leftmost tunnel.