Leaving the reception hall, Sinbadi was waiting for him in the castle courtyard.

"Well, is the Great Chief interested in your diving outfit?" asked the Sandman with gusto. After a week of getting along, the two got acquainted with each other a lot, and they became half friends. "What is the reward for discovering the ruins?

Rex shook his head a little lost, "He's not going to buy a diving outfit......"

"This ...... Ah," Simbadi reacted quickly, "but it's normal that the Greycastle Kingdom doesn't need to, and when the news gets out, the Fjord Chamber of Commerce will definitely notice your invention." The sea is a treasure basin, that's what you've said, isn't it?"

He did say that, and Rex thought to himself, since the King of the Grey Keep had decided to summon them, apparently taking the matter very seriously, he would be rewarded handsomely according to the terms of the recruitment. Both the reward itself and the title of explorer attracted a lot of attention and conversation, and the name of the diving suit made it famous throughout the fjord islands.

But......

He smiled bitterly, "Your Majesty's reward is a book. ”

Sinbadi was stunned, "What did you say?" Shamin lowered his head slightly, his gaze moved to the object in the other party's hand, "Could it be ......"

"This is it. Rex nodded helplessly. The book is not thick, probably only dozens of pages, and there is not a word on the cover, let alone the exquisite borders and prints. Even if it was given by an ordinary nobleman, it looked rather shabby, and it really didn't look like a reward that could be taken in.

Such a reward is unlikely to bring fame, and if it is spoken, it may attract ridicule.

"The Great Chief shouldn't be like this...... Sinbadi stomped his foot, "Even I was rewarded with twenty golden dragons, and you, as the initiator of the salvage plan, should have received more than me!"

The fjordman's upheaval warmed Rex's feelings, but he knew in his heart that it was not worth questioning a powerful ruler with such a thing, because he was still hesitating if he had already made a promise to grant him what he wanted.

At this time, a personal guard walked over, "Your Majesty has prepared a residence for you, please come with me." ”

"Thank you. He quickly bowed, and then motioned for Sinbadi to follow him—anyway, let's go back and take a good look at the contents of the book.

Shortly after leaving the castle district, Rex suddenly heard a strange buzzing sound.

It's like a series of muffled thunder from the sky, but it's even more crisp.

He snorted softly and followed the sound into the distance.

I saw a faintly visible black dot appear in the blue sky.

As soon as he came up with this idea, he quickly denied his guess, this distance is only several miles, what bird can fly with such momentum?

The Sandman apparently noticed the vision, and his whole body tensed up, like a warrior on guard.

"That thing...... It's coming at us!"

"Enemy?" Rex said in surprise, "in the Greykeep Capital?"

"I don't know...... But it's not anything like a bird or beast!"

"Take it easy," the guard who led the way said calmly, "It's just a favorite toy of Her Royal Highness the Eldest Princess, although it may be unbelievable when you first see it, but you will get used to it after a few more days here." ”

"The Princess's ...... Toys?" The two found themselves completely incomprehensible to each other's words.

Her Majesty had advised Her Highness Tiri not to leave the test site as much as possible, but she thought that the site was too small to be used to the fullest, and that the only route left was the Castle District, except for the residential areas, the factory area, and the whirlpool. "But I always think that she is deliberately here to show off her skills to His Majesty." ”

Still incomprehensible.

However, even if he couldn't understand it, Rex caught a hint of pride in the other party's expression.

In less than a few breaths, the black dot that was still far away in the sky was already in front of him—and in that almost roaring roar, the fjordmen saw the most incredible scene of their lives.

The metal creature with two pairs of long wings swept over his head like a violent wind, its shadow dozens of times larger than that of the largest seabird, and its shape alone made people feel extremely heavy, but it was precisely this incomparably heavy iron beast that was soaring in the sky at this moment. At the same time, he also saw the figure of a woman on the iron beast, although it was not really visible, but it was indeed carrying a person flying.

Fan......

The name popped into Rex's mind.

The Strange Objects Society was not a well-organized association, and he didn't have much contact with the other party, only going to watch it on the day of the public verification of the flying wings. To be honest, he even hates Fan a little, because of his unrealistic delusions, which cause the already unrequited strange things to become even worse.

But now there are people who have accomplished this feat in an even more exaggerated form.

Looking at the winged iron beasts circling around the castle, a huge wave set off in his heart.

......

The guards led the two into an inn known as the "Diplomatic Building", left a sentence of "My name is Sean, if you think about it, you can always come to the castle area and let me know the answer" before turning and leaving.

Sinbadi was still in great shock, and he was muttering about the protection of the three gods, and then he ran to the window and looked out, not knowing whether he was afraid or wanted to see the unbelievable creature again.

Rex locked himself in his bedroom.

He stared at the featureless book in his hand, as if to see His Majesty's thoughts through it, and it took him a quarter of an hour before he opened the cover.

In the course of a quarter of an hour, he made all sorts of hypotheses, from ordinary biographies and eulogies to descriptions of the customs of Neverwinter, or wealthy contracts disguised as books, or even threatening notices to force members of the Stranger Society to move to Neverwinter—

But nothing.

On the first page there is only one sentence, the law of buoyancy.

An object immersed in a stationary fluid is subjected to a buoyant force equal to the weight of the fluid dislodged by the object, vertically upwards and through the centroid of the dislodged fluid.

At first glance, it seemed very awkward, but after reciting it silently in his heart several times, Rex's eyes gradually widened.

He quickly turned to the second page, and it turned out to be a full page of arithmetic. Probably because of his ability to understand, each formula was accompanied by detailed annotations, and the more he looked at it, the more difficult it was for him to look away.

Volume, density, buoyancy...... These concepts were not unfamiliar, they were familiar, but at this moment, it was as if he had seen them for the first time.

Each word is no longer an abstract expression, but a number with a unit, and whether an object is sinking or floating, and to what extent, can be known as soon as you lift the pen.

Rex was instantly reminded of the steel ships and hydrogen balloons sold to the fjord—they seemed to be vivid and vivid in his memory.

Later, there is a submersible that can sink and float autonomously. Although it is only a conceptual diagram, it will undoubtedly work with the previous equation.

In the last few pages of the book, he saw a strange large ship, which could sail on the surface of the water like an ordinary sea boat, and could shuttle under the water like a fish. Its massive body is large enough to hold hundreds of people, and even the deadliest wind and waves pose no threat to it underwater.

Rex was completely intimidated by the idea.

At the same time, there was also a sense of tastelessness in my heart.

It's as if he has taken a small step on an unknown path, and just when he is rejoicing, someone else has pointed out the whole path.

Thinking of the roaring Iron Beast, it seems that there is more than one path to Neverwinter like this.

He already understood the meaning of the word "reward".

If he refuses the conditions of the King of the Grey Keep, then with the content of this book, he will definitely reach a new level in his diving and salvage career. It's just that the second stage is already the limit that an individual can reach, and as for the third stage of the diving boat, he basically has nothing to do with him in this life.

If His Majesty Roland's invitation is granted, this book will be the most powerful means of convincing others, and the Society of Curiosities will be given a new lease of life.