It depends on the novel. For example, in a mystery novel, the friends could be named Detective Smith and his sidekick, Johnson. But without knowing the novel about villanelles, it's just a wild guess.
Let's consider a novel set in a small town. In the villanelles within that novel, the friends might be named after local landmarks or family names. So, it could be something like Oakley (after a big oak tree in town) and Thompson (a common family name in the area). However, this is all very much based on assumptions as we still don't know the exact novel in question. There could be all sorts of creative and unique names that the author has chosen to give to the friends in the villanelles depending on the overall narrative of the novel.
One possible novel from 1841 could be 'Moby - Dick' by Herman Melville. The title character being the great white whale, Moby - Dick.
One possible theme could be cooperation. Friends working together to achieve a common goal, like building a treehouse where each friend has a specific task to contribute. Another theme might be loyalty. Friends staying by each other's side through tough times, no matter what. For example, if one friend is being bullied, the others stand up for him.
One possible plot could be that the four friends decide to start a band. They practice hard, face some setbacks like not being able to find a good place to rehearse at first, but then they manage to get a gig and become popular.
Perhaps they start a business together in the '2 friends story'. They face many difficulties at the start, like lack of funds and competition. But through their combined efforts and their strong friendship, they manage to succeed in the end.
One strong candidate is 'The Murders in the Rue Morgue' by Edgar Allan Poe.
One of the possible first submarine novels could be 'Twenty Thousand Leagues Under the Sea' by Jules Verne. It's a very well - known work that features a submarine, the Nautilus, and many adventures beneath the waves.
There are different contenders for the title of 'the first immigrant novel'. 'America is in the Heart' by Carlos Bulosan is another one. It chronicles Bulosan's own experiences as a Filipino immigrant in the United States. It shows his hardships, his dreams, and his perception of the American dream, which gives an in - depth look at the immigrant psyche and could be among the early works exploring immigrant life.
One possible theme could be friendship and support. If the story involves taking care of a diaper - wearing friend or helping with diaper - related tasks, it shows how friends can be there for each other in all situations.
One possible characteristic could be a strong sense of tension and suspense. Since it's about a hostage situation, the author would likely build up the feeling of danger and uncertainty. Another might be a focus on the relationships between the hostages and their captors, like how they interact, negotiate, or struggle against each other.
One possible characteristic could be its controversial content. Since it's 'heretic', it probably contained ideas that went against the established norms, like unorthodox religious views or new social concepts.