Was Maturin added later to the novel?

Yes, it was. Some edits were made to improve the flow and coherence of the story.

Water margin was one of the four famous novels in ancient China, and its plot was widely praised. Different readers would have different opinions on whether Gao Yamen really existed. Gao Yaya was a powerful warlord in Water Margins and was considered one of the most corrupt characters in Water Margins. However, different readers would have different opinions on whether Gao Yamen really existed. Some people thought that Gao Yaya was a fictional character in Water Margins, added by the author Shi Naian. Because the plot of Water Margins happened in the late Ming Dynasty, Gao Yaya appeared relatively late in Water Margins, so he might be a fictional character added by the author. There were also some readers who believed that Gao Yaya really existed. He was a warlord at that time and had a certain connection with other characters in Water Margins. Different readers have different opinions on whether Gao Yaya really exists. It is impossible to determine whether he really exists, but the storyline in Water Margins is a real historical event.

I'm not sure exactly when Maturin shows up. It might vary depending on your interpretation of the story.

Some elements like elaborate descriptions of the settings or additional dialogues between characters might have been added later to enhance the story's vividness.

I'm not sure exactly, but you might be able to find it by referring to online summaries or fan forums dedicated to the IT novel.

The Aubrey - Maturin novels by Patrick O'Brian are best read in the order they were published. The first one is 'Master and Commander'. Then the series progresses chronologically through the Napoleonic Wars era, with each novel building on the previous in terms of character development and the overarching historical narrative.

Another excellent one is 'Post Captain'. In this novel, we see the further development of the characters. Aubrey's career progression and his personal growth are well - depicted, along with Maturin's adventures on land and sea as he pursues his scientific and espionage interests.

There's 'The Ionian Mission' in the list.

The two main characters are Jack Aubrey and Stephen Maturin. Jack Aubrey is a naval officer, brave and passionate about the sea and his career. He is excellent in naval combat and leading his crew. Stephen Maturin is a physician, naturalist, and also a bit of a spy. He has a very different personality from Aubrey but they form a strong friendship.

Well, the Aubrey - Maturin novels should be read in a specific order. Beginning with 'Master and Commander', this sets the stage for the entire series. It's in this first book that we meet Jack Aubrey, a naval officer, and Stephen Maturin, a physician and naturalist. Their friendship begins here and they embark on their first adventures together. Then comes 'Post Captain' which continues their story, showing their further development both as individuals and in their relationship. And as you keep reading the novels in the correct chronological order, you'll see how they grow older, face different challenges at sea and on land, and how their world changes with the passage of time and different historical events.