"It's not difficult," said Holmes, "to be honest, I thought I had come across some rare case, at least the one that happened on Isle of Allen in 1832, but I went to the scene and found it nothing remarkable, so let's talk about John's Mill first." ”

Holmeston paused, "Remember when we chatted this afternoon?" ”

"You're talking about the impact of your professional opponent type?"

"Yes, I've been doing research on this lately, and I've been looking at a lot of people from all walks of life in the city of London, masons, fishermen, cooks, typists, and so on...... I went out every morning at dawn, stayed in the slums until the sun went down, and spent a great deal of time studying their hand shapes, comparing them with each other, and with other people in the same trade, and the results were remarkable, and I was about to put them together in a paper," said Holmes, "and I had examined the child's palm by the river, and compared it with the results of my research, and although her body had been soaked in the water for quite some time, there was no doubt that she worked in a textile factory. So there is no problem with your previous observations, because the long hours of work have made her body a little weak, and it is likely that she was still sick at the time of the incident. ”

"But there are so many mills in London, so why are you sure she's in that John's mill?"

"Good question," said Holmes, "I tend to think that the distance between the place where the body was abandoned and the place where it was found is very close, and this is easy to explain, the time when the body was found was during the day, and although the river was a little foggy, the visibility was actually okay, and if there were pleasure boats or cargo ships passing by from time to time, it would be difficult to float too far away without being found. ”

"Wait, but you said her body was soaked in water for quite some time."

"That's right," Holmes smiled slyly, "but let me pay attention to my wording, I'm talking about her body soaking in the water for quite some time, not floating for quite some time." ”

"Is there any difference between the two?"

"Of course, judging from the state of the corpse, the time of the victim's death should have been last night, the perpetrator accidentally killed her, and then the whole person was very flustered, he threw the body into the river, and he should have tied a stone or something, so that no one would find out, people would only think that the child was missing, and there are people in the city who can't get along every day, especially for the lower class like her, not too many people care where she went, you must know that the police department's attitude towards disappearances and murder is completely different."

"Then why was her body found by the patrol again?"

"There are many possibilities, maybe the perpetrator was too nervous and didn't tie the rope, maybe something happened to happen and broke the ......rope," Holmes said, "I'm not guessing, in addition to the timing of what I said, I did find traces of being tied with rope on the victim's wrist, so that it can be explained, her body was soaked in water for a long time, but it didn't take long to actually get out of trouble and drift to the place where it was found." ”

"John's Textile Factory is the closest textile factory upstream, and it is also the first place I suspected, and I also found some blue crystals in her hair, which are copper sulfate pentahydrate formed by copper sulfate when it meets water, and coincidentally the John's Textile Factory happens to be next door to a chemical factory, which is also the most important basis for my final inference." Sherlock Holmes Road.

"It's better to see than to hear, and this has raised criminal investigation to a level that is almost exact science." Zhang Heng also expressed his heartfelt admiration.

Although Holmes didn't say anything when he heard the compliment, the expression on his face still looked very useful, and he paused and continued, "As for the inferences about the perpetrators, to put it bluntly, it is not a big deal. ”

"I want to hear about it."

"We all know that the perpetrator wanted to take advantage of the victim, but was fiercely resisted by the child, she was very brave and kept fighting with the other party, but the difference in strength between the two sides was too obvious, so she didn't escape in the end, but the guy didn't feel comfortable for too long, and was scratched by the victim, although the body was soaked in water for a long time, but there was still some skin tissue left between the nails, which was probably the reason why he was angry and angry, and strangled her in a fit of anger."

"Wait...... You say your child was strangled to death? ”

"That's right." Sherlock Holmes affirmed.

"But wasn't she hit her head hard?" Zhang Heng asked.

"Like I said, there was a fight between the two, judging from the traces of the wound, I tend to think that her head hit the table, but it was not fatal, what really killed her was suffocation, not suffocation in the water, but someone choked her throat, she had bruises on her neck, but it was not obvious after soaking in water, it is not easy for ordinary people to find, as for saying that they knew each other is also normal, at that time, it was already dark, if it was a man and a woman who did not know, it was almost impossible to be in the same room."

"And what about his height, you said he was about six feet tall, how did you deduce that?" Zhang Heng asked.

"Well, it takes a bit of skill," said Holmes, "and I simulated their ...... Well, the location, the woman is below, the man is on top, and then the direction and angle of the palm can be determined by comparing the bruises on the neck, and then the approximate height of the murderer is about the same as mine. ”

Sherlock Holmes talked eloquently, and finally sorted out all the previous inferences before serving.

A lot of things in this world are like this, and when I first heard the conclusion, it felt amazing and incredible, but once I knew the reasoning process, it didn't seem so mysterious, it was like a magician's magic.

"Positive reasoning is very easy, for example, when you see bread, you know it's breakfast, but vice versa, this is also the ability that detectives need to exercise, if you want to learn, you can start by guessing the occupation, from a person's sleeves, shoes, calluses on the index finger and thumb, fingernails, shirts, expressions, etc., guess what profession he is engaged in, such as the gentleman at the table behind you, just by observing me, I can know that he has just returned from Afghanistan and is a military doctor."

When Zhang Heng heard this, he showed a strange look on his face for the first time tonight, thinking that it would not be such a coincidence.

Sherlock Holmes thought that Zhang Heng didn't believe it, and said again, "We can make a bet to see which of us can accurately say more things related to him, don't worry, I have never met him before." ”

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