Tick...... Tick......

In the center of the mysterious hall, which is not very bright, there is a lonely grandfather clock, the rectangular style of the grandfather clock is very ordinary, boxy, and the top of the bell is also flat, just now it was stepped on by a little confused and energetic curly-eared cat. Pen ~ fun ~ pavilion www.biquge.info

The dark brown table clock, though old and quaint, and even scratched and painted on it, is still walking diligently, and the brass-colored pendulum follows the principle of isochronism of the pendulum and maintains accurate time with the help of the mainspring.

Tick tick tick ...... In a silent and empty environment, this rhythmic sound can be relaxing and calming, but it can also induce fear in the human heart, which varies from person to person. However, Bai Huang was not human, he was just checking if there was anything worth his attention about this old grandfather clock.

Because, it is so conspicuous that it is almost engraved with words such as the key to customs clearance.

However, after a moment, Bai Huang resisted the urge to dismantle the movement and walked to the bookshelves around the hall instead.

The mysterious hall is very large, but it is also very empty, so there are not many things that need to be searched, Bai Huang and Christina's thinking is the same, they also start from the stairs and search one by one, but he chose the opposite direction, so that one positive and one negative, you can exchange the results when you meet, and then review it along the other party's path, efficient and cautious.

On the left side of the stairs was a row of bookshelves without partitions, on which were densely packed with books, Bai Huang took one at random and patted the dust on it. "Introduction to the Basics of the Four Elemental Magic", look at the name to know what the content is talking about, Bai Huang looked through some casually, and there is nothing worth noting, if the clues are hidden between the lines, then there will definitely be other corresponding clues, otherwise it is not called puzzle solving, but reading comprehension.

After a cursory glance at the titles of various books, Bai Huang found that they were all very common books, with basic introductions to various professions, as well as some literary masterpieces, so it was reasonable for any mage to place precious and unique treasures on the first floor of the magic tower for visitors to flip through at will.

Despite this, Bai Huang still picked it up one by one and flipped through it and put it back in place, although there was no need to read, but heavy books have always been a good place to hide things, well, and his obsessive-compulsive disorder attacked.

A bookshelf looks like about sixty or seventy books, and there are two or three hundred books in the row here, so Bai Huang waved his hand to summon a few skeletons, they can't do complicated things, but it's no problem to help him flip through the books.

On the other side, Christina was swinging with great interest an intricate box, which she had found in the mezzanine of a secret cabinet, the surface of which was covered with brilliant patterns, and the stripes on one side of the box were clearly divided into several layers, on which were locked one by one. At the other end is a delicate and complex mechanism, each component is embedded with each other and leaves room for movement, simply put, it is a three-dimensional version of "Huarong Dao", which is a very common type of puzzle solving, compared to the ghost beasts such as the Nine Rings and Kong Ming Lock, which are much simpler.

It's not that difficult, but it's just right for Christina, who rarely touches educational toys, to both use her brain and keep her entertained.

It didn't take long for the outer locks to be unfastened one by one, revealing a small monocle lying quietly inside. Christina carefully picked up the monocle, which was clearly a puzzle-solving aid, and placed it in front of her eyes, through which she scanned around and saw nothing out of the ordinary.

But for the rest of the process, she must have to wear a monocle the whole time.

The time to solve the puzzle always passed very quickly, fortunately there was no time limit, but after half an hour had passed, the two finally met at a wooden table.

Christina, with a monocle, watched Bai Huang try to remove an oil painting, inspect it carefully, and then hang it back.

Bai Huang looked at the small monocle worn by Christina, shook the yellowed parchment on his hand, and said, "Look at it~"

He lay the parchment on the wooden table, and Christina leaned in to examine the blank parchment, but could not find any change in it.

"You're going to try it?" Christina frowned as she handed the monocle to Bai Huang.

"I don't have eyes, so it's weird that this thing works. Although he said this, Bai Huang still looked at the parchment through the monocle with the mentality of trying and not getting pregnant.

The results were no different.

"Maybe it's not meant to be worn. Bai Huang pinched the small monocle and said this, he took the monocle and the parchment to a magic lamp, spread out the parchment with his left hand, and held the monocle in his right hand to adjust the distance according to the brightness of the light.

The soft magical light focused on the parchment through the monocle, and Bai Huang turned the monocle, and the spots of light shining on the parchment wandered. A long strip of fine pattern gradually emerges on the swept parchment, with a thick round end and a thin pointed end.

"It's ...... The pattern of the hour and minute hands overlapping?" Christina, apparently having also carefully observed the old grandfather clock, Bai Huang nodded, and swept every part of the parchment on the front and back, without any changes other than this pattern.

"It's as simple as that? Let's twist the hour and minute hands again and we'll be cleared?" Bai Huang and Christina approached the floor clock in the center of the hall with a skeptical attitude.

The time on the hour hand was exactly 12:45, and the pendulum ticked and ticked.

"Maybe it's not meant to be worn. Bai Huang pinched the small monocle and said this, he took the monocle and the parchment to a magic lamp, spread out the parchment with his left hand, and held the monocle in his right hand to adjust the distance according to the brightness of the light.

The soft magical light focused on the parchment through the monocle, and Bai Huang turned the monocle, and the spots of light shining on the parchment wandered. A long strip of fine pattern gradually emerges on the swept parchment, with a thick round end and a thin pointed end.

"It's ...... The pattern of the hour and minute hands overlapping?" Christina, apparently having also carefully observed the old grandfather clock, Bai Huang nodded, and swept every part of the parchment on the front and back, without any changes other than this pattern.

"It's as simple as that? Let's twist the hour and minute hands again and we'll be cleared?" Bai Huang and Christina approached the floor clock in the center of the hall with a skeptical attitude.

The time on the hour hand was exactly 12:45, and the pendulum ticked to the ground

The first to mix the full attendance, and the later increase and change...... (To be continued.) )