In order to become a Heroic Spirit, I had no choice but to cause trouble in history.

"So, Lawrence, what has it been all these years of wandering far from home, turning yourself into this颓废 (颓废 is a difficult word to translate directly, but it implies a state of decadence, apathy, or disillusionment)?" Leonardo da Vinci asked, somewhat puzzled.

Anno forced a smile: "It's for what Harley entrusted to me, or at least I consider it an entrustment."

"So what exactly is it?"

"Come with me."

Anno handed Roson over to Luslan to take care of; what was about to happen was not suitable for children to see.

Anno brought Da Vinci to the outskirts of the city, where Anno's laboratory was located.

Or, to put it another way, a storage room for materials.

Anno opened the basement of the cabin, and a strong smell of blood immediately hit him.

"I study the human body and yearn to change the fate of people who die from disease. This is what I have been doing all these years."

The laboratory also contained a considerable amount of human tissue, which made Leonardo da Vinci feel somewhat nauseous.

"Lawrence, you..." Da Vinci covered his mouth.

Anno was already used to it: "Don't worry, I got these corpses from the cemetery manager. I haven't killed anyone."

"This is the only way to conquer the disease—I will not believe in any God or deity, never."

At that moment, Da Vinci felt that Lawrence was a stranger, but upon closer observation, he realized that his way of working diligently on a task was no different from before.

He didn't know what to say, so he just patted Anno on the shoulder.

Anno smiled with relief, picked up two sheets of paper from the table, and handed them to Da Vinci: "To my shame, even after studying this matter for nearly ten years, I still fall short of completely solving this problem."

Leonardo da Vinci was somewhat startled as he looked at what was recorded on the paper.

The Black Death was a terrifying and incurable disease, one from which there was no chance of survival.

"You were just one step away from the goal?"

Anno nodded and sneered, "Disease is not some divine punishment at all."

He turned and took a specimen off the shelf: "Do you know what this is?"

Leonardo da Vinci looked at the dried specimen: "A...mouse?"

"These are rats, which are the source of the Black Death, or at least one of the links in the transmission to humans."

"I found the same phenomenon in a sample I took from a Black Death patient and in rats from areas where the Black Death occurred: there was a black substance in the blood of both the patient and the rats, but I did not find this substance in the rats from healthy areas when I dissected them."

"While the possibility of humans transmitting the virus to rats cannot be ruled out, it is well known that rats are filthy and evil creatures, so it is not surprising that they bring some diseases."

“No wonder you said you might die…” Da Vinci subconsciously moved a little further away from the old mouse. “You really have courage… Aren’t you afraid that Adroson will lose his father after losing his mother?”

“I was scared, I was terrified, but for some reason, even though I lived in a village that was almost wiped out by the Black Death for a month, I didn’t get the plague. Maybe that’s a gift from Harley,” he said with emotion.

Of course, in reality, he had only been vaccinated with something called BCG in another world.

“Every year on the anniversary of Harley’s death, I go back to Florence to visit Harley, and then take a distant look at my teacher Verrocchio and my mansion before leaving.” Anno sat in his chair, looking at the ceiling. “Because of what I’m doing now, I’ve adopted a pseudonym to escape the Church’s pursuit.”

"So, having anticipated being hunted down by the Church, you chose to leave Adrosson to me and then embark on this path of no return, right..." Leonardo da Vinci touched his forehead. "What can I say about you..."

Anno took something out of the drawer, her eyes filled with sadness and cherishing: "Take a look, Leonardo... This is what Harley left me."

What is this?

"I named it the Harley Mirror."

Da Vinci leaned closer, and Anno adjusted the light, placing a specimen underneath.

"This is......"

"A tiny world invisible to the naked eye."

......

Da Vinci and Anno spent the afternoon tinkering in the laboratory.

Suddenly, Leonardo da Vinci remembered something: "Oh right, I think I've forgotten something."

"what's up?"

"Come with me quickly, there's a surprise."

Anno locked up the cabin and followed Leonardo da Vinci back to London.

By this time, it had already gotten dark.

The two hurried back to the hotel, and Anno was a little tired.

Years of intense work left him often feeling mentally disoriented and unable to concentrate.

Furthermore, neck pain can also cause dizziness.

The door opened, and someone appeared who was someone Anno never expected.

"This is my gift... Not just to me and Luo Song, you should also make it up to this person."

The teacher and the student looked at each other.

Anno chuckled and patted the little guy's head.

"Honestly, he hasn't grown any taller yet."

"Teacher, I've come to see you."

At 32 years old, Manlio's height remains the same as before, and he has an undiminished youthful charm.

The master and apprentice embraced briefly. Manrio was somewhat excited and kept clutching the hem of his clothes.

“Manrio and I have been keeping in touch by letter. He knew I was coming to see you today, so he contacted me in advance.”

Anno paused for a moment, wiped away the tears from the corners of her eyes, and patted Da Vinci on the shoulder: "Thank you for your kindness."

"It's my duty."

Adroson came closer, and Anno hugged him.

Luslan stood behind Anno.

“Leonardo da Vinci, how about painting a picture for us?” Anno asked his friend calmly, maintaining his posture.

Leonardo da Vinci smiled nonchalantly: "No problem."

------------

Chapter 223 Falling in Love Again, Never to Be Apart

Leonardo da Vinci stayed in London for a few days.

Anno and Leonardo da Vinci talked a lot.

We discussed Adrosson's growth over the past decade, Leonardo da Vinci's artistic activities during that time, the immense changes within Florence, and Antoine's life of constant hiding and exile over the past ten years...

"I can't offer you any more advice on your life, Lawrence, but in the days to come, let Adroson have his own father."

"I know, and I've made my plans." Anno touched her neck with her right hand and sighed. "When do you plan to leave?"

"tomorrow morning."

"So urgent?"

Da Vinci couldn't help but smile: "You must have hope for your new life, or you'll grow old prematurely like you."

The two remained silent for a while.

"Be careful when traveling alone."

"it is good."

......

Leonardo da Vinci has left, and what awaits him is a life of unbridled freedom.

Instead of driving away his student Manrio, Anno kept him by his side.

During the ten years that Manlio was away, he studied architectural design with an architect, which satisfied his interest, but his greatest wish was still to stay by Anno's side.

Adroson also stayed by Anno's side, and Anno would often teach him some medical knowledge.

Time flies, and it is now the end of 1487.

The old butler, Luslan, finally couldn't hold on any longer. He was aging naturally, and even Anno, with his superb medical skills, couldn't reverse Luslan's decline.

The three buried Luslan outside London and began a life of wandering.

However, in 1488, a letter from Leonardo da Vinci summoned Anno back to Florence.

Verrocchio was getting old and his health wasn't good, so Anno chose to return to Florence, the place where his success began, to personally take care of Verrocchio.

On the day he returned to Florence, Anno went to the cemetery and spent the whole night with his wife, telling her everything he wanted to say.

In 1490, Verrocchio, whose life had been forcibly extended by Anno, finally succumbed to the ravages of time and was buried in the Florentine cemetery by Anno and Leonardo da Vinci.

In 1492, Anor finally solved the problem of dosage of medicine for treating the Black Death and cured a Black Death patient for the first time.

In the same year, Anno's paper was officially published, causing a sensation throughout Europe.

The most serious disease in human history, a horrific disease that killed one-third of the population of Europe in the last century, has actually been conquered?

Countless doubts arose, but Anno responded to all the doubts with a cure rate as high as 70%.

But Anno was still not satisfied, and he continued to devote himself to the application of bacterial drugs and the pursuit of higher cure rates.

In 1493, Adroson was sent by Anno to one of his mystical friends, Joseph Zorgane, whereupon he was formally recognized by the mystics and entered the mystical organization for further study.

Anno was accompanied only by his student Manrio, and they lived a nomadic life throughout Europe.

In 1495, Joseph Zorgen's son was born and named Marchi Zorgen by his godfather, Anno.

Anno worked tirelessly.

He always felt that there was not enough time, that he was worried that he would not be able to make more efficient use of the bacterial drugs and that he would not be able to achieve a higher cure rate.

As a student, Manlio often tried to persuade Anno to stop pushing himself so hard, but Anno, who had become a stubborn old man, simply wouldn't listen and stubbornly continued working.

In his spare time, Anno would visit his son in London. Adroson had become someone he could no longer reach, but his father still loved him.

Occasionally, Anno would go to the countryside to relax and relieve his fatigue, firmly believing that nature is the best place for humans to unwind.