For Touba, Charles is still trusting for the time being.

This guy is indeed crazy, but judging from his previous actions of helping himself, he should not be hostile, otherwise he could have stopped helping and let the pirates capture them directly.

Walking down the rocky aisle, Charles could see the ant-sized pirates on the docks below, and the toy ships on the sea in the distance.

The narrow aisles of the mountain city were sporadically skewed past them, but they had no intention of attacking, and after glancing at Tuba and going about their business.

It was as if the tuba in front of him, with a cross placed above his head, really worked.

"Mr. Charles, are we really invisible, why aren't they attacking us anymore?" Lily, who was standing on Charles's shoulder, stretched out her little paw with some curiosity and grabbed the clothes of a pirate next to her.

"Nope. ”

Charles knew that they were definitely not invisible, but he was also a little puzzled by how the old madman in front of him did this.

Following Tuba and walking around the mountain city for nearly half an hour, they came to a low cave.

"Walk through here and we'll see what you're looking for. Tuba said with a smile and bent down first.

"You can't say that the fuel is buried in this mountain, is it?" Charles asked Tuba.

If the fuel really has to be in this way, then it is really easier for him to rush into the black exchange just now with people, at least there is a glimmer of hope to grab it from there.

If they really want to carry fuel from this mountain, I'm afraid that if they don't finish it, the pirates will already surround them.

"No, on the other side of the mountain. That's where the fuel comes from. The tuba urn in the cave replied angrily.

The environment in the cave is short and stuffy, and people have to walk half-squatting in it, which is very depressing.

After nearly ten minutes of walking in this environment, Charles, who was extremely resilient, and the small rats were okay, but Feuerbach was a little unable to hold on.

Listening to the sound of breathing behind him getting heavier and heavier, Charles asked, "How's it going?"

Feuerbach wiped the sweat from his forehead with his sleeve. "It's okay! It's just a little aggrieved, compared to this environment, the vast sea really belongs to me. ”

The discomfort didn't last long, and five minutes later, they emerged from the other side of the mountain.

The scenery in front of him suddenly opened up, and Charles, standing halfway up the mountain, looked down. Scattered complexes of large and small buildings are located in the valley between the mountains.

But Charles's gaze did not fall on the buildings, but on the distant seashore, the most striking of all, the ruins of a giant ring facility.

It was a huge industrial facility not much smaller than the surrounding mountains, and although it had been very damaged by the erosion of time, Charles was still shocked.

"Hey, pirates can't make something this big, it should be the Foundation again, why do these guys have it everywhere. Richard jumped out.

"There, that's where the fuel comes out. Tuba said, pointing to a group of buildings underneath the Ring Facility.

Tuba pointed to a black shed estimated the size of four football fields, from which it was impossible to see what was inside, only that several towers had been erected around it, and searchlights illuminated the surroundings. The security is very tight.

Standing tall, Charles also saw some details, and at the back of the factory, several messy and intersecting railroad tracks were connected.

It wasn't the rails of a train, but the tracks of a minecart, which was carrying something and heading for the back of another mountain on the island.

Because of the distance, Charles couldn't see what was on the minecarts, only that the rocks were black.

"Let's go down. With a happy face, Tuba walked down the steep stone path to the bottom.

"Is the fuel here from coal mines, or the residue of whale oil?"

As for charcoal, Charles didn't ask at all, how could there be charcoal fuel in such a place where even grass doesn't grow.

"Coal whale oil? What is that? I don't know, we call it the Black Ball, we've been here for so long, and we've been burning that thing. ”

Charles thought to himself. "It sounds like a coal mine, but it looks like the island has a lot of coal resources. ”

After descending from the mountain, they cautiously approached the massive facility.

Walking quietly along the circular facility for a few minutes, they were now so close to the black-shack complex that Charles could even see the white breath coming out of the mouths of the patrolling pirates on the high platform.

Tuba was about to walk towards the black iron gate of the complex when he was stopped by Charles. "What are you doing!"

"It's okay, I'll be invisible, I'm not afraid! Tuba patted his chest and pulled out the crumpled cross again.

Charles couldn't let him mess around, he was just an ordinary pirate before, and this was obviously an important location on the island, and he was completely gambling on his life to go in like this.

But if Tuba makes the slightest mistake, Charles's entire mission will be wasted, and he can't risk it in this place.

"Lily, let your friends explore the way. Charles said to the mouse on his shoulder.

Compared to bright humans, small rats are obviously suitable for lurking and probing, which is why Charles brought Lily here.

The black-brown rats next to Squeak squeaked for a moment, and the four rats ran down the dark corners towards the complex.

"Don't worry, Mr. Charles, I've taught them a lot before, and Hop Hop will be able to make it clear this time. ”

Charles, with a solemn expression, nodded, as long as they could figure out whether this was a fuel plant or not, their mission to the island this time was completed.

Time passed little by little, and Charles, who was getting anxious, took out his pocket watch from time to time to confirm the time, and he never felt that time was so long.

"Dude, shall we go through here?" Richard controlled his eyes as he turned to the giant ring beside him.

"Don't look for trouble, haven't you caused enough trouble, dear" Charles squeezed this sentence out between his teeth.

"How can you call it nothing to look for, it's all broken and there is no top. What's the danger? You see, there's cobwebs. ”

Unmoved, Charles stood still looking at his pocket watch.

"You're not bored like that, this kind of facility is the Foundation's, go inside and see what's going on, they're coming down from the surface. What if there is any key information about exports? ”

"Don't talk nonsense, I don't want to quarrel with you at this time. ”

"Why don't you compromise and let Lily's rats in? ”