We come from the sea, and when we return to the sea, whether we sail or look at it from afar, it is as if we have found a home in the dark.

The letter recounts the trivialities of Mrs. Hudson's life this week, and thanks to this lonely wife, Liu Fanxu can even tell how many eggs are in the refrigerator in Mrs. Hudson's kitchen in England. Just when she thought it was another diary with a narrative that was not different from the previous one, a name appeared in the second half of her letter that had never appeared before—Sherlock Holmes.

This man with the same name as the well-known detective on five continents is also a consulting detective, a wonderful coincidence, or an inevitable development. Liu Fanxu read with interest the last description of Mrs. Hudson, the young Sherlock Holmes, the same kind man who had helped Mrs. Hudson send her husband to prison and put him in prison. The young man, who had been blessed with Mrs. Hudson, had recently rented her house, the living room and two bedrooms on the second floor of 221B Baker Street, and the name of the man with whom Sherlock Holmes had been shared was John Watson.

Putting down the letter, she felt the urge to talk to Red on the phone, and this wonderful combination naturally reminded her of Conan Doyle's world full of deductions. Mrs. Hudson introduced the two tenants to her in great detail, one was more than six feet tall, tall and thin, the only difference from the description in the book was that his facial features were not deep, his hair was cute with natural curls, his family background was obviously richer than that of Sherlock Holmes in the book, and his brother was not a minor government official as described in the book.

This is not a clue provided by Mrs. Hudson, but a clue that Liu Fanxu himself sees. With her usual caution, she saw that the letter was different from the previous ones, and that it had been read by a third or more people besides Mrs. Hudson and herself. Although they were careful to re-glue the letter intact, the residual marks on the paper and the smell of the test potion in the paper texture could not escape her keen eyes and sensitive nose. Putting down the letter, Liu Fanxu gently leaned on the back of the chair, his eyes were blurred and he looked at a certain place on the curtain, and his mind kept filtering all kinds of information.

The letter was apparently sent by Mrs. Hudson, and was transferred to the person who examined the letter, and without asking the reason and without alarming the person, obtained the letter directly from the post office, and had sufficient means to cover up the traces of the aftermath, and finally to restore the letter and return it to the post office, and to ensure that the letter was delivered to the recipient on time, and that there would be no suspicion due to delay. The person who can do this in the UK is definitely not just a minor government official. This man is very controlling, ruthless and decisive, an older man with good skills, and the fact that the surveillance of the letters began after Sherlock Holmes moved in, shows that his attitude towards this young man is biased, wanting to understand his living environment but not being detected by him, indicating that he is not Sherlock Holmes's elder but the elder brother of the same generation.

Although Mrs. Hudson did not mention in the letter whether Sherlock Holmes had a high-ranking brother, through a series of deductive analyses, Liu Fanxu was very sure of this person's existence, and it is conceivable that at this time, on that person's desk, there must have been a complete set of personal information about Mrs. Hudson, as well as a set of false information that Liu Fanxu had perfected in the Muggle world. Although it is uncertain whether the man's hand can reach into the United States, since the letter has been delivered to her seemingly untouched, it at least means that he has confirmed that she and Mrs. Hudson are harmless. In other words, that terrible brother should be called McCroft Holmes. Thinking so, Liu Fanxu folded the letter paper and put it back into the envelope, got up and walked to the desk, opened the drawer, and put the letter and other letters into a box.

Liu Fanxu, who realized that he had been secretly checked by someone, picked up the pen depressedly and considered the reply to Mrs. Hudson. She needs to pretend to be unaware and communicate naturally with Mrs. Hudson, while protecting her and Red's private information as much as possible. After all, as an FBI, Rhett's identity is sensitive, and she doesn't want to let him have unnecessary contact with a certain executive of the British government because of her, so as to give the CIA an opportunity to invite her Rhett to 'tea'. It took twice as long to write a reply than usual, and Liu Fanxu blew the letter paper with satisfaction, folded them and put them in the envelope.

In the letter, as has always been the case, she first expressed concern about Red's safety after he left the field. She then lists the books that Rhett has read during her field work, and puts forward different insights and opinions on these books, and finally concludes with a scientific reality that has succeeded or failed. These are the fixed narratives of her letters to Mrs. Hudson, and the part about Mrs. Hudson is much easier, and she can form a constant reply by simply giving advice and replies to the trivial questions raised by Mrs. Hudson.

It was only because of the intervention of an invisible man that she was no longer in such a relaxed state of mind as she used to be when she wrote back to Mrs. Hudson. Liu Fanxu sighed, raised his hand and rubbed his eyebrows, in fact, this kind of exchange has lost its original meaning, but Mrs. Hudson is still in the dark.

As soon as Rhett returned home, Liu Fanxu greeted him with a letter, she first told him the ins and outs of the matter, and at the end told him the opinion she had deduced and analyzed by herself as a possibility, hoping that he could more objectively confirm whether she had deduced this matter correctly. Apparently, Red came to the same conclusion, and although he couldn't spot the potions on paper by smell alone, he, as a doctor of chemistry, had all sorts of ways and means in his brain to verify her words. However, Red did not feel that this matter was dangerous, and it was clear that the other party's purpose was to protect rather than harm, so Red told Liu Fanxu that she could continue to communicate with Mrs. Hudson as she wished. Liu Fanxu, who received an accurate reply, put the letter back in the storage box.

Red didn't pay much attention to the man, also named Sherlock Holmes, even though his co-tenant was also John Watson, even though they also lived at 221B Baker Street. And Liu Fanxu just shrugged his shoulders and put this matter aside for the time being. Because Red was going out on duty again, and he had just returned home, less than two hours later. Liu Fanxu stood by the hanger and took off the coat that had just been hung up not long ago, and the cold air brought in from the outside could still be felt on the clothes. She clutched the collar of her coat and bowed her head slightly, her eyelashes fluttering. Red stood in front of her, staring intently at the top of her hair, his face distressed, his lips pursed tightly, and after a while he stretched out his hands and gently took her into his arms. His lips pressed against the top of her hair, kissing "Aga, I'm sorry"

Liu Fanxu shook his head vigorously in his arms, moved his lips, and his voice sounded glutinously, "Actually, I can go with you." She paused, then said, "We clearly agreed before, but I have never been able to accompany you because of the research at hand. Rhett's eyes flashed, his eyes flashed with promise and hesitation, he opened his mouth, but finally couldn't say the affirmative, "I'm sorry, Aga, I know you don't like the blood, so, you can wait at home for me to come back." I swore that I would rush back as soon as the case was over. ”

Red pursed his lips, he knew how unconvincing these words were, because even he himself desperately hoped that Liu Fanxu would go with him. This is not only because he can see her at all times, but also because Liu Fanxu can help him clear his mind and solve the case faster. It has become a habit to call her whenever a case reaches a bottleneck, and whenever and wherever he says something, he can be inspired by her words. Morgan once joked that Liu Fanxu was a foreign aid of their BU, and Hodge directly asked him for his opinion on the intention of absorbing Liu Fanxu into the BAU, although he had not reported this matter to Strauss for the time being, but the politician who was like a human spirit would know about Liu Fanxu's existence sooner or later. And the FBI has always adhered to the purpose of not flowing into the fields of outsiders, and it is only a matter of time before he talks to Liu Fanxu.

This makes Red very conflicted, he desperately hopes that Liu Fanxu can work with him, as Morgan said, there are not many people who can keep up with his train of thought, so when they think about a problem together, the efficiency and probability of solving the problem will also increase exponentially; On the other hand, he was worried that if Liu Fanxu really worked with him in the FBI, it would bring her trouble in the wizarding world.

Liu Fanxu pushed Rhett away, she raised her eyes to look into his eyes, from that flickering gaze, she confirmed his thoughts, so she smiled and raised her hand to stroke his cheek, and said softly, "I know what I'm doing, Spencer, compared to you, none of that matters, I can't accompany you not because I'm afraid of the dark and bloody but because I do have something to do, in fact, I've been doing it all year." Seeing that he had become very curious because of her words, she curled her eyebrows happily and continued, "When my current ideas come to fruition, I will sue you whether I fail or succeed." Red pursed his lips, puffing out his cheeks unhappily, he stared at Liu Fanxu fixedly for a few seconds, and then said slowly, "If you want to tell me as soon as possible, I'm curious, what kind of real thing it looks like, you need to study it for a year and still can't get results." Liu Fanxu nodded, and sent Red out of the door with crooked eyebrows, he leaned over and kissed her lips, and kept muttering, "What is it?" She smiled and did not answer, but said silently in her heart: it was to save her mentor.