When Xu Decai talked about the part of the time when they got lost in the house behind the main hall, I saw Xu Decai's face, showing a strange expression, his eyebrows, obviously wrinkled inward at the same time, often when a person has this expression, it means that he must have remembered something unusual, and the impression left by this incident must be very unforgettable, either thrilling or ...... Terror!

I caught the expression, but I didn't seem to be very interested in it, in fact, the most important thing I wanted to know at the moment was what his arm was...... How did it break!

But at this moment, I don't want to ask, since Wu Laohan didn't ask directly, then he must want Xu Decai to start from the beginning, and I have to listen to him patiently!

But then, Xu Decai devotes a lot of space to describing to us the layout of some of the houses and lanes, according to him, it is a large number of houses made of wood and stone with the exact same structural shape, and these houses can hardly find the slightest difference in terms of appearance and detail, as if they were all copied from a mold!

There is a laneway about one meter wide between the houses, and these lanes separate the houses one by one, and each house is about seven or eight meters long and wide, and the height is about five or six meters, so when you walk in the laneway, it is like walking into a deep tunnel!

It is precisely because of the extremely similar structural characteristics and the characteristics of many and deep lanes that it is particularly easy to get lost when shuttling through them.

However, when it comes to the root cause of their loss, it can naturally be traced back to the blue light that Xu Decai said they saw, and I immediately became very interested in it!

"How did you end up here? Have you ever figured out what that blue light emitter is? Wu Laohan then asked.

Xu Decai breathed a sigh of relief and continued: "We shuttled through the labyrinthine house for nearly half a day, and finally, we found the marks left by our predecessors in a laneway...... And...... Footprints! ”

"Signs? And footprints? "I couldn't believe my ears.

"Not bad!" Xu Decai added: "We can be sure that we must have never walked in the alley where we found the marks and footprints, and the marks on the walls of the alleyway are definitely the first time we have seen them!" ”

"Is there anyone who has been there before you?" I couldn't help but ask.

"Based on what we saw at the time, it should be like this!" Xu Decai paused and continued: "However, what is certain is that there are at least two batches of people in front!" ”

As soon as I heard it, I sensed something in his words: "Why do you say this? Could it be that there are several different types of signs? ”

"It's not!" Xu Decai shook his head: "It's the time difference between the footprints and the marks, they are obviously not left at the same time!" ”

"Tell me what the footprints and marks look like?" Cai Changsheng interjected and asked.

Xu Decai recalled for a moment, and then said: "We saw the footprints first, and then found the marks!" We were like three headless flies, in a hurry to find our way, when Lao Gu suddenly noticed footprints in a lane, and he beckoned us to look! ”

Xu Decai swallowed his saliva, and then said: "At that time, I saw two different sizes and different models of footprints in the alleyway, one of which was slightly larger, and the soles were stacked with wavy patterns, and the patterns didn't look particularly clear, and they should have been left at least a week ago!" The other pair of footprints is relatively smaller, the sole pattern is composed of closely connected triangles, the edges and corners of the lines are clearly visible, as if they have just been printed, and several of these footprints are printed on the top of the wavy footprints, so I preliminarily estimate that the footprints should be two people in front of and behind! ”

"One before and one after?" I couldn't help but interject and ask, "According to you, these two people must have crossed that alleyway in a week or something?" This is what you call the time difference? ”

Xu Decai shook his head when he heard it: "No, this is only secondary, the time difference I am referring to is between the footprints and the marks on the wall!" ”

"Oh yes!" As soon as he reminded me, I remembered that there was another mark, and then I asked, "What kind of mark?" Is it a scissor that points the way? ”

"I'll talk about the content of the mark later, but you can first listen to me analyze the relationship between the person who left the mark on the wall and the person who left footprints on the ground!"

As soon as I heard this, I chuckled in my head: "You mean to say that this mark was not left by the man who left the footprints in front of me?" ”

"Not bad!" Xu Decai nodded and said, "This is the time difference I am talking about!" I will not talk about the content of the mark, but judging from the shape of the mark being carved and the distribution of two pairs of footprints on the ground, it is enough to conclude that they were not made by the same people! Because, the footprints are basically parallel to the entire roadway, according to the habitual analysis, this should be through the roadway and stay, if this person still has to carve a mark on the wall, then he must face the wall and stand, then on the ground below the mark, there must be a double perpendicular to the wall footprints, but in fact they are parallel to the entire roadway, as if the person who left the footprints just hurried through the roadway, did not stay at all! ”

"Wait a minute!" I immediately felt a little confused in my head: "What the hell is going on here, as far as you mean, the people who passed through that alley are still three different groups of people?" ”

"Yes!" Xu Decai nodded and said: "And as far as my analysis is concerned, the person who left the mark should be the first person to pass there, because the mark on the wall was carved by someone with a sharp weapon, and each stroke of the cut looks not very sharp, and has a slight layer of raw edges, in this environment, it should only be caused by the weathering of the stone wall, but it will take many years!" ”

"I rely on, that is to say, the earliest group of people, may still be ...... Years ago? ”

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