The moment the sound sounded, Xia Lei's left eye locked on that direction. The sight of his left eye also penetrated the layers of grass, and when he saw something in the grass, he suddenly couldn't help but laugh. It wasn't a man hiding in the grass, it was a snake.

A false alarm.

Shalei bypassed the snake's territory and continued on his way, and after about ten minutes he finally reached the bottom of the hillside. He finally saw the tombstone, which was only half cut in the grass. It was covered by dense weeds, and the broken sections were covered with bird droppings. The lost half of the tombstone fell into the grass next to it, and the cut of the cross could be faintly seen. The stone was covered with moss, and there were people carved Italian characters on it with stones or knives. Boring words like Alice is here, I love Leonardo, and Pede is a pig.

It seems that Italians love to do this kind of thing, too.

These notches also indicate that although this place is very remote, there are many people who have been here. Perhaps the reason why this tombstone broke was related to these unscrupulous visitors.

Behind the broken tombstone is a mound, not very high, about knee-high. The mound is covered with weeds, and there are nests built by birds on it. Other than that, there is nothing special about this place. At first glance, it is just an ordinary tomb. It will not be a nobleman buried here, maybe a carpenter, a butcher, or a farmer, just an ordinary person.

However, it was such an inconspicuous and ordinary ancient tomb, and Xia Lei couldn't help but get excited when he saw it for the first time. Because it bears almost 90 percent resemblance to Leonardo da Vinci's tomb on canvas.

Hundreds of years have passed, and although the tomb has changed a lot, the hillside and the river on the opposite side are all in line. Add to that the carved crosses on the tombstones, and the remaining ten percent can be ignored.

"The map that Leonardo da Vinci left on the canvas is so complex that it's like a labyrinth. The entrance on the map is just below this stele, and it looks like I've really had to dig a grave. But before I do that, I'll have to look at the following. Xia Lei thought so in his heart. After this thought, his left eye jumped slightly, awakening his clairvoyance.

Little by little, the earth disappeared from his view, and after a depth of about one and a half meters, a marble stone slab blocked his view. He tried to see through the marble slab, but unfortunately he couldn't expand it any further when he was only halfway there. The one-meter-and-five-deep earth, coupled with the very dense marble slabs, was already the limit of his perspective ability.

Everything has its limits, and so does his ability to see. If there were no limits, he would be able to see the situation on the other side of the earth, and he could even see the situation on distant planets, which is obviously impossible.

However, although I didn't see the situation below, the presence of the marble slab was already a hint. There is no coffin, there is a marble slab, which is obviously a fake tomb. Its secret lies beneath that marble slab.

Xia Lei raised his eyes and looked around, and the surroundings were quiet. Everywhere he could see, there was no one. Such a situation facilitated his actions. He took off his backpack, took out a sapper shovel from his backpack, and began digging graves.

The soil of the tomb was soft, and his excavation was not difficult. He dug shovel after shovel, the pit in front of him getting bigger and deeper, and the mound of dirt behind him grew bigger and bigger, piled higher and higher.

An hour later, the marble slab was revealed. It was much larger than the pit he had dug, and as he looked through the surroundings, he soon saw that the marble slab was like a door that lay flat in the dirt. To his dismay, though, the marble slab was so thick that even if he stood on it with his feet, he couldn't fully see through it and see underneath.

He estimated that this marble slab was at least a meter thick and weighed hundreds of tons!

This conclusion startled his own, and it was clear that Europe hundreds of years ago did not have the tools to carry a piece of marble weighing 100 tons. But it still appeared here, incredible.

"I'm dizzy, such a big piece of marble, how can I go down?" Xia Lei was worried.

Blasting with a blasting device is the easiest way to solve the problem, but the vibration from blasting is not a good thing, it will attract the attention of the townspeople and even the police. But without the use of a blasting device, even the most powerful man in the world would not be able to smash it open with a hammer.

Is this a dead end?

Xia Lei frowned, and his gaze fell on the marble slate. Soon, a white object peeking out of the dirt caught his idea. He squatted down and cleaned the lump of dirt with his hands.

Hidden in the dirt was a ball made of white marble, about the size of a basketball. Half of it was embedded in the marble, and when he picked it up, he could see a pit. There is a gear in the pit, and the gear is made of bronze, but the strange thing is that the teeth on the gear are not ordinary teeth, they are letters.

"What kind of mechanism is this?" Xia Lei's heart was full of curiosity, and he pushed the gear with his hand. The tentacle felt heavy and blocked, but it moved slightly. A letter B on the gear slid into the marble and became two-thirds of a B.

If you are active, you must have an article.

Xia Lei followed and pushed the gears into the marble with all his might. New letters appear one by one, and the feeling of blockage becomes smaller and smaller. A few minutes later, he pushed the gear a full turn, from B to B. However, the marble did not open, and there were no secret doors to open. This gear is like a clever joke, specially designed to tease explorers.

"It can't be, I must have missed something. Xia Lei pondered in his heart, and then he pushed the gears a full circle, from B to B. This time, there was no movement.

But at this moment, Lei De's heart moved, and his eyes suddenly moved to the opposite side of the gear. His left eye jumped slightly, and the dirt that obscured his vision disappeared from his left eye's vision. Then he saw another stone ball made of white marble, exactly the same as the one he had just picked up.

Xia Lei couldn't wait to walk over, he cleaned the dirt from that place, and then picked up the white marble ball. Sure enough, under the stone ball was the same pit, the same bronze gear. The difference is that the letter that stays at the top of the bronze gear just now is B, and this one is W.

Xia Lei pushed the gear with his hand, and this bronze gear was quickly pushed as well. He pushes the bronze gear, from W to W. The marble still hasn't moved.

These two bronze gears are obviously the mechanism, and the letters are also the key to activating the mechanism, but he has tried all the letters, why is there still no movement?

Thinking about it, Xia Lei's "Mona Lisa" painted by Leonardo da Vinci suddenly appeared in his mind, and at that moment he seemed to understand something, and the corners of his mouth couldn't help but show a smile. He then got up and walked over to the first bronze gear, pushing the gear to move the letter A to the very top of the bronze gear. He then moved to the second bronze gear and moved the letter E to the very top.

Click......

There was a strange noise, and the marble slabs under his feet shook.

The letters A and E are indeed the code to open the marble slate, and Leonardo da Vinci has long left this code in the smiling eyes of the Mona Lisa!

The vibrations grew louder and louder, as if hundreds of gears were turning, generating kinetic energy to open the heavy marble slabs.

Xia Lei did not dare to stay on the marble slab any longer, and he jumped into the dirt pit. Just as his feet were on the pit, the marble slabs in the pit suddenly opened with a thud, revealing a gap about two feet wide. Only then did he realize that it was not a single piece of marble, but two pieces of a patchwork. The work of the patchwork was so exquisite that he did not even see the gap between the two marble slabs.

The two marble slabs suddenly shrank a little to the left and right, and the earth on the walls of the pit fell down with a clattering sound. Xia Lei stepped back a little, and looked down into the gap between the two marbles.

The space beneath the marble was pitch black, and the light shining through the cracks seemed to be swallowed up by the darkness, and there was no bottom to be seen.

Xia Lei used his eyesight to see through the darkness, and then the faint light that fell through the gap explored downward. This time he saw the bottom, but it also scared him. The space under the marble slabs was not very deep, but the bottom was filled with bones, human, beastly, whatever the bones were painted black. The light actually reaches the bottom, but the large number of black bones forms a black "vortex", and their presence makes the light appear to be swallowed.

Not only are the bones black, but even the stone walls underneath are black. Black bones, black stone walls, and the space under the marble slabs is a black world that seems to swallow everything, and even light cannot escape.

Xia Lei suddenly remembered the description of Princess Yongmei. She was trapped in a dark world, with no sound, no light, no temperature, nothing! she didn't want to be in it, even for a second.

"Could it be that Leonardo da Vinci also studied the space inside the box? he knows more than me?"

No matter what, he has come, and even if he is afraid of the place, he will go down to explore the truth.

A few minutes later, Xia Lei even slipped to the bottom with the climbing tool in his backpack. Standing on the black pile of bones, he could see the gaps between the marble slabs above, and the faint light that shone through the cracks. The height from the ground to the bottom is only 20 meters, and it is not bottomless. And he soon discovered that the paint applied to the bones and stone walls was not ordinary paint, they had a certain light-absorbing effect.

Shaley wrung a glow stick. With the light emitted by the glow sticks, he soon discovered the entrance to the passage hidden in a stone wall.

The passage extends forward, and the stone used to build it is also dyed black with black paint. With no end in sight, this passage exudes an aura of terror everywhere.

But just as Xia Lei was observing the passage, the two marble slabs above his head slammed shut.

PS: There is another chapter in the evening, about half past nine. Thank you for your support!